Veterinary Medicine
Why This Matters
Your livestock are your food supply, your labor force, and your transportation. A disease outbreak can kill half your herd in a week, wiping out years of careful breeding. Zoonotic diseases — those that jump from animals to humans — have caused the worst epidemics in history, including plague, tuberculosis, and influenza. Keeping your animals healthy is not just animal welfare; it is a direct requirement for human survival.
Animal Health Assessment
The single most important veterinary skill is recognizing when an animal is sick before it becomes critical. Healthy animals behave in predictable ways. Any deviation from normal is a warning sign.
Daily Observation Checklist
Every morning when you check your animals, look for these signs:
| Sign | Healthy | Sick |
|---|---|---|
| Appetite | Eats eagerly when food offered | Refuses food, picks at food, drops food from mouth |
| Eyes | Bright, clear, alert | Dull, sunken, watery, crusty discharge |
| Nose | Clean, slightly moist | Excessive discharge, bloody, thick mucus |
| Ears | Upright and responsive (species-dependent) | Drooping, unresponsive |
| Coat/hair | Smooth, glossy | Rough, dull, patchy, hair loss |
| Posture | Stands squarely, moves freely | Hunched, head down, reluctant to move, limping |
| Feces | Formed, normal color for species | Watery diarrhea, blood, mucus, parasites visible |
| Urination | Normal frequency, clear to pale yellow | Straining, dark, bloody, absent |
| Breathing | Quiet, regular rhythm | Rapid, labored, coughing, wheezing |
| Udder (dairy) | Soft, even, clean | Hard, hot, swollen, painful, discolored milk |
Vital Signs by Species
You need to know what is normal to recognize what is abnormal:
| Species | Normal Temperature | Normal Pulse (beats/min) | Normal Respiration (breaths/min) |
|---|---|---|---|
| Cattle | 38.0-39.5 C | 40-80 | 12-30 |
| Horse | 37.5-38.5 C | 28-44 | 8-16 |
| Sheep | 38.5-40.0 C | 60-90 | 12-25 |
| Goat | 38.5-40.0 C | 70-90 | 12-25 |
| Pig | 38.0-40.0 C | 60-100 | 8-18 |
| Chicken | 40.5-42.0 C | 250-300 | 15-30 |
| Dog | 38.0-39.2 C | 60-140 | 10-30 |
Taking temperature: Use a smooth, oiled rod inserted 5-8 cm into the rectum. Hold for 2 minutes. A rectal thermometer is ideal; without one, compare body warmth by pressing the back of your hand against the ear base — fever feels distinctly hot.
Taking pulse: In cattle, press fingers against the underside of the tail base where the artery crosses the tailbone. In horses, press against the jawbone artery (under the jaw where it crosses the bone). Count for 15 seconds and multiply by 4.
Respiration: Watch the flank rise and fall. Count for 30 seconds and multiply by 2.
Common Livestock Diseases
Bloat (Ruminants — Cattle, Sheep, Goats)
The animal’s rumen (first stomach) fills with gas it cannot expel. The left side of the abdomen swells visibly. Untreated bloat kills within hours by compressing the lungs.
Causes: Overeating wet legumes (clover, alfalfa), sudden grain overload, or obstruction of the esophagus.
Treatment:
Step 1 — Act immediately. Force the animal to walk — movement sometimes releases gas.
Step 2 — If gas persists, pass a stomach tube (a smooth, oiled hollow reed or rubber tube) down the throat into the rumen. The tube must be at least 2 cm in diameter and 1.5 meters long for cattle. Guide it gently over the back of the tongue; the animal will swallow it. Gas will rush out when the tube enters the rumen.
Step 3 — If a tube is unavailable and the animal is about to die (labored breathing, unable to stand), perform an emergency rumenotomy: insert a sharp knife or trocar into the left flank, midway between the last rib and the hip bone, at the highest point of swelling. Insert it firmly — you will hear gas escaping. This is a last resort that risks infection but saves the animal from suffocation.
Step 4 — After gas relief, drench (pour into the mouth) 100-200 ml of vegetable oil to break up remaining foam.
Warning
Bloat is the most common emergency in ruminant livestock. Know the stomach tube technique before you need it. Practice passing the tube on a healthy animal so you can do it quickly in an emergency. Have a tube and vegetable oil accessible at all times.
Foot Rot (Cattle, Sheep, Goats)
Bacterial infection of the hoof tissue. Causes severe lameness. Spreads quickly through a herd in wet conditions.
Signs: Limping, swelling between the toes, foul smell, separation of hoof wall from tissue.
Treatment:
Step 1 — Restrain the animal and lift the affected foot. Clean all mud and debris from the hoof.
Step 2 — Trim away any loose, dead, or underrun horn tissue with a sharp hoof knife. Expose the infected area to air.
Step 3 — Soak the foot in a strong salt solution (200 grams salt per liter of water) or a copper sulfate solution (50 grams per liter) for 5-10 minutes.
Step 4 — Dry the foot and apply a paste of honey and crushed garlic to the wound. Wrap with a cloth bandage.
Step 5 — Keep the animal on dry ground. Repeat treatment daily until the lameness resolves (typically 5-10 days).
Prevention: Keep animals on dry ground; maintain clean, dry bedding; trim hooves regularly (every 6-8 weeks for sheep and goats).
Mastitis (Dairy Cattle, Goats, Sheep)
Infection of the udder. Reduces milk production and can be fatal if untreated. Infected milk is unsafe for human consumption.
Signs: Hot, hard, swollen udder quarter; pain when touched; abnormal milk (clots, watery, discolored, bloody).
Treatment:
Step 1 — Milk out the affected quarter completely. This removes bacteria and toxins. Milk into a separate container and dispose of it — do not drink or feed it to other animals.
Step 2 — Repeat milking of the affected quarter every 4-6 hours (more frequently than normal milking).
Step 3 — Apply warm compresses to the udder to reduce swelling and improve blood flow.
Step 4 — Administer a garlic and honey drench (crush 3-4 large garlic cloves in 100 ml of honey, mix with warm water, pour into the animal’s mouth). Garlic has broad antimicrobial properties.
Step 5 — If the animal develops fever or stops eating, the infection has become systemic. Isolate the animal and increase supportive care (fluids, continued milking).
Prevention: Clean udders before milking. Dip teats in dilute vinegar or salt solution after milking. Milk on a regular schedule. Keep bedding clean and dry.
Parasite Control
Parasites are the most persistent health threat to livestock. Almost every animal carries some parasite load; the goal is to keep the burden low enough that it does not cause disease.
Internal Parasites (Worms)
Signs of heavy worm burden: Poor weight gain despite adequate food, rough coat, potbelly (especially in young animals), diarrhea, visible worms in feces, pale gums (anemia), bottle jaw (swelling under the jaw from fluid accumulation).
Confirming worms: Examine fresh feces. Break apart a sample and look for small white or reddish worms. Tapeworm segments look like flat grains of rice. Roundworms are thin and 5-15 cm long. Many worm eggs are too small to see — base your treatment decision on symptoms.
Herbal Deworming
| Herb | Active Against | Preparation | Dosage (per 50 kg body weight) |
|---|---|---|---|
| Garlic | Roundworms, some tapeworms | Crush fresh cloves, mix with feed or honey | 2-3 large cloves daily for 5 days |
| Wormwood (Artemisia) | Roundworms | Dried herb steeped in hot water for 30 min | 1 tablespoon dried herb, drench as tea |
| Pumpkin seeds | Tapeworms | Crush raw seeds | 50 grams crushed seeds mixed in feed |
| Tobacco (small doses) | Roundworms | Dried leaves, finely chopped | 1-2 grams for sheep — TOXIC in excess |
| Diatomaceous earth | Intestinal parasites | Food-grade, mixed into feed | 1 tablespoon per 25 kg body weight |
Warning
Tobacco is genuinely toxic. The difference between a deworming dose and a lethal dose is narrow. For cattle and horses, do not use it. For sheep and goats, do not exceed 2 grams per animal. Better to stick with garlic, wormwood, and pumpkin seeds, which have wide safety margins.
External Parasites (Lice, Ticks, Mites)
Signs: Intense scratching, rubbing against objects, hair loss in patches, visible parasites on skin.
Treatment:
Step 1 — Inspect the animal in good light. Part the hair and look at the skin surface. Lice are tiny (1-3 mm) and move quickly. Ticks are larger and embedded in the skin. Mites are often too small to see but cause crusty, thickened skin.
Step 2 — For lice and mites: prepare a wash of strong tobacco tea (boil 200 grams of tobacco leaves in 5 liters of water for 30 minutes, cool) OR a neem oil solution (if neem trees are available — mix neem oil with water and a small amount of soap as an emulsifier). Sponge the wash over the entire body, working it into the coat. Repeat in 10 days to catch hatching eggs.
Step 3 — For ticks: remove individually by grasping the tick as close to the skin as possible and pulling with steady, even pressure. Do not twist or crush — the mouthparts can break off and cause infection. Apply a drop of oil to the bite site after removal.
Wound Care
Cleaning Wounds
Step 1 — Restrain the animal securely. A frightened, injured animal can kick or bite, injuring you.
Step 2 — Flush the wound with clean water — lots of it. Use a stream from a bucket held above the wound. The mechanical force of flowing water removes debris and bacteria better than dabbing.
Step 3 — Remove any foreign material (thorns, wood splinters, dirt) with clean tweezers or fingers.
Step 4 — For deep or contaminated wounds, flush with a mild salt solution (1 teaspoon salt per liter of clean water). Do NOT pack wounds with soil, manure, or cobwebs — these introduce tetanus and other deadly infections.
Step 5 — Apply honey directly to the wound surface. Honey is antibacterial, keeps the wound moist for healing, and does not irritate tissue. Reapply daily.
Bandaging
- Lower leg wounds: Wrap with a clean cloth strip, starting below the wound and spiraling upward. Overlap each layer by half. Not too tight — you should be able to slide a finger under the bandage.
- Body wounds: Difficult to bandage. Keep the wound clean and apply honey or a poultice. Protect with a fly screen (cloth draped over the wound) if flies are a problem.
- Change bandages daily. Inspect for signs of infection: increasing swelling, heat, pus, foul smell, red streaks spreading from the wound.
Abscess Drainage
An abscess is a pocket of pus under the skin. Common in all livestock, especially at injection sites and from thorn wounds.
Step 1 — Wait until the abscess is “ripe” — soft, fluctuant (feels like pressing a water balloon), and pointing (the skin over the center is thin and may be discolored).
Step 2 — Clean the area with salt water. Using a sharp, clean blade, make a single incision at the lowest point of the abscess so gravity helps drainage.
Step 3 — Express all pus by gentle pressure around the margins. Flush the cavity with salt water.
Step 4 — Leave the incision open — do not suture it closed. Abscesses must drain from the bottom up. Pack lightly with honey-soaked cloth if needed.
Step 5 — Flush daily until no more pus drains and the wound is filling with healthy tissue.
Birthing Assistance (Dystocia)
Most livestock births proceed without help. Intervene only if labor has stalled for more than 30-60 minutes of active straining with no progress.
Normal vs. Abnormal Presentation
| Presentation | Description | Action |
|---|---|---|
| Normal (anterior) | Two front feet and nose visible | Let proceed naturally; assist by gentle traction if needed |
| One leg back | Only one foot and head visible | Reach in, locate missing leg, bring it forward |
| Head back | Two feet visible but no head | Push feet back in, locate head, bring it into birth canal |
| Breech (tail first) | Tail or buttocks visible, no feet | Reach in, locate both hind legs, bring them into the canal |
| Twins tangled | Multiple feet from different offspring | Sort out which legs belong to which — deliver one at a time |
Step 1 — Wash your hands and arms thoroughly with soap and clean water. Lubricate your hand and forearm with oil or animal fat.
Step 2 — Gently reach into the birth canal and determine the position of the offspring. Feel for the head, front legs, and spine to understand the orientation.
Step 3 — If a leg is folded back, cup your hand over the hoof (to protect the uterine wall) and guide it into the canal.
Step 4 — Apply traction only during contractions. Pull downward (toward the mother’s hocks) and outward. Never use more force than one person can apply with their hands. If you need a rope or chain, you are near the limit where a cesarean would be needed in modern practice — proceed very carefully.
Tip
Keep the mother calm and quiet. Dim lighting, minimal noise, and familiar handlers reduce stress hormones that inhibit labor. Often, simply giving the animal more time in a quiet, private space resolves a stalled labor.
Castration
Castration prevents unwanted breeding and makes male animals more docile and manageable. Perform it on young animals (1-4 weeks old for small ruminants, 1-3 months for cattle) when the procedure is simpler and recovery is faster.
Method — Open Castration (most common for small ruminants):
Step 1 — Restrain the animal securely. Clean the scrotum with soap and water.
Step 2 — Using a sharp, clean blade, cut the bottom third of the scrotum off.
Step 3 — Squeeze each testicle through the opening. Grasp the cord attached to each testicle. Pull with steady, downward pressure until the cord breaks (for lambs/kids) or cut it with a clean blade (for calves), leaving a 3-4 cm stump.
Step 4 — Do NOT suture the incision closed — it must drain. Apply a dusting of wood ash or a coating of honey to prevent flies.
Step 5 — Monitor for bleeding (should stop within 30 minutes) and for infection over the following week.
Warning
Perform castration in cool, dry weather to minimize fly strike. Never castrate during hot, humid fly season unless you can keep the animal indoors and protected. Fly strike (maggot infestation) of castration wounds can be fatal.
Zoonotic Diseases
These diseases spread from animals to humans. Understanding them protects your community.
| Disease | Source Animals | Transmission Route | Human Symptoms | Prevention |
|---|---|---|---|---|
| Brucellosis | Cattle, goats, sheep | Contact with birthing fluids, unpasteurized milk | Chronic fever, joint pain, fatigue | Pasteurize milk; wear gloves during animal births |
| Tuberculosis (bovine) | Cattle | Unpasteurized milk, aerosol from coughing animals | Chronic cough, weight loss, fever | Pasteurize milk; cull persistently coughing cattle |
| Rabies | Dogs, bats, foxes, livestock | Bite from infected animal | Fatal once symptomatic | Avoid unfamiliar animals; kill rabid animals |
| Anthrax | Cattle, sheep | Contact with infected carcasses or soil | Skin sores, respiratory failure | Do NOT open carcasses of animals that died suddenly with blood from orifices; burn the carcass |
| Ringworm | Cattle, horses | Skin contact | Circular, itchy skin lesions | Isolate affected animals; wash hands after handling |
| Q fever | Sheep, goats, cattle | Inhaling dust from birthing areas | Flu-like illness, pneumonia | Dispose of birthing waste properly; limit exposure |
Warning
If an animal dies suddenly with blood oozing from its nose, mouth, or anus — do NOT cut it open. This may be anthrax. Anthrax spores survive in soil for decades. Burn the entire carcass where it lies. Do not move it. Do not touch it without protective clothing. Notify your community immediately.
Quarantine Protocols
When to quarantine:
- Any animal showing signs of infectious disease (fever, discharge, rapid breathing, diarrhea)
- Any new animal brought into your herd from outside
- Any animal that has been in contact with a sick or dead animal of unknown cause
How to quarantine:
Step 1 — Separate the animal from the herd by at least 50 meters, downwind if possible.
Step 2 — Assign one person to care for quarantined animals. That person should not handle healthy animals without washing hands, changing clothes, and cleaning boots between groups.
Step 3 — Provide separate feed and water containers. Do not share equipment between quarantine and the main herd.
Step 4 — Observe for at least 14 days before returning to the herd (21 days for new animals from outside).
Record Keeping
Track every animal individually. This sounds tedious but saves lives and improves breeding decisions.
For each animal, maintain a record of:
- Identification (ear notch pattern, brand, name, physical description)
- Birth date and parentage
- Vaccinations or treatments administered (date, product, dose)
- Illness episodes (date, symptoms, treatment, outcome)
- Breeding dates, birth dates, offspring health
- Body condition score at regular intervals
- Deworming dates and products used
Tip
Use a simple notebook with one page per animal. Update it at every interaction. When an animal dies, record the cause of death. Patterns in your records reveal problems: if all animals pastured in a certain field develop foot rot, the field is too wet for grazing. If all offspring from one sire are weak, stop using that sire.
What’s Next
With veterinary skills established, advance to:
- Animal Husbandry — apply health management to improve breeding programs and herd productivity
- Public Health — integrate zoonotic disease prevention into community health systems
Veterinary Medicine -- At a Glance
Daily Health Check: Eyes, nose, appetite, posture, feces, udder, breathing — any deviation from normal is a warning.
Three Emergencies to Prepare For:
- Bloat — stomach tube + oil drench (minutes to act)
- Dystocia — repositioning stuck offspring (clean hands, lubrication)
- Hemorrhage — direct pressure, tourniquet for limbs only
Parasite Control Schedule:
- Deworm every 3-4 months (garlic, wormwood, pumpkin seed)
- Check for external parasites weekly
- Rotate pastures to break parasite life cycles
Quarantine Rules:
- Isolate sick animals 50+ meters from herd
- Separate caretaker, equipment, feed, water
- 14 days minimum observation (21 for new animals)
Zoonotic Disease Warning Signs:
- Sudden death with blood from orifices = possible anthrax — do NOT open, BURN in place
- Chronic cough in cattle = possible TB — pasteurize all milk
- Unpasteurized milk = risk of brucellosis, TB, Q fever
Emergency Action Bloat Stomach tube; emergency trocar if dying Foot rot Trim, salt soak, honey, dry ground Mastitis Frequent milking, warm compress, garlic drench Difficult birth Reposition; gentle traction during contractions Wound Flush with water, honey, bandage, change daily