Wound Care
Part of Veterinary Medicine
Principles and practices for managing wounds in livestock, from initial assessment through healing and closure.
Why This Matters
Wounds are inevitable in any livestock operation. Wire cuts, kicks, abrasions, bite wounds, punctures from sharp objects in pastures and paddocks — animals in any active environment encounter hazards. The difference between a wound that heals cleanly in two weeks and one that becomes a chronic, infected, proud-flesh-forming problem is almost entirely determined by how it is managed in the first 24–48 hours.
Good wound management requires understanding wound biology — why certain conditions promote healing and others prevent it — rather than memorizing protocols. The principles are few and consistent: clean wounds heal, infected wounds don’t; moist wounds heal faster than dry ones; protected wounds heal better than abraded ones; wounds with good blood supply heal faster than those without.
In a survival context, the additional challenge is that the materials for ideal wound care may not be available. Understanding which improvised materials are acceptable substitutes and which are contraindicated is as important as knowing ideal protocols.
Initial Wound Assessment
Before any treatment, assess the wound systematically:
Location and depth: Superficial (skin only) wounds are managed differently from deep wounds involving subcutaneous tissue, muscle, joints, or body cavities. A wound over a joint warrants urgent concern — joint infections are catastrophic in livestock and may require aggressive treatment.
Age of wound: Fresh wounds (under 6 hours) can often be closed by suture or staple; contaminated wounds more than 12 hours old generally should not be closed primarily (bacterial counts are too high). Wounds older than 24 hours without treatment are typically managed as open, infected wounds.
Blood supply: Well-vascularized areas (face, scalp, lower leg in horses) heal better than areas with poor supply (horse lower limb distal to fetlock, extremities in general). Wounds with devitalized (dead, gray-black) tissue at the edges will heal more slowly.
Contamination level: A clean wound from a sharp object (knife, shear) is far less contaminated than a wire laceration in a muddy paddock. Adjust cleaning intensity accordingly.
Bleeding: Controlling hemorrhage is the first priority if significant. Apply direct pressure with a clean cloth. Arterial bleeding (bright red, pulsing) requires more aggressive pressure or tourniquet above the wound on the limb. Venous bleeding (dark red, steady flow) usually controls with sustained pressure.
Wound Cleaning
The most important step in wound management. See the dedicated Wound Cleaning article for full technique. The key principles:
- Flush copiously with clean water or saline under pressure
- Remove all visible contamination (hair, debris, devitalized tissue)
- Use antiseptics appropriately (dilute, not concentrated)
- Do not use products that damage healing tissue (full-strength iodine, hydrogen peroxide, alcohol)
Wound Closure Options
Primary closure: Suturing or stapling wound edges together immediately. Appropriate for: clean lacerations less than 6 hours old; wounds in well-vascularized areas; wounds where dehiscence risk is low. Not appropriate for: heavily contaminated wounds, crush injuries, wounds over 12 hours old, wounds in areas of high movement tension, puncture wounds (which must drain).
Delayed primary closure: Wound is cleaned thoroughly, managed open for 3–5 days, then closed once it is clean and granulation tissue has begun to form. Best for: contaminated wounds you want to clean up before closing.
Secondary intention healing: The wound is left open to heal from the base up through granulation tissue formation, contraction, and epithelialization. Most livestock wounds are managed this way. Advantages: allows drainage, no risk of trapping infection under closure. Disadvantage: slower, may produce more scar tissue.
Simple interrupted suture: If closure is appropriate, simple interrupted sutures with non-absorbable material (heavy thread, fishing line) or absorbable material can be placed. Space sutures 1–1.5 cm apart. Tie tight enough to approximate edges, not so tight as to cut tissue. Leave the wound able to drain at the dependent (lowest) point.
Open Wound Management
Most livestock wounds are managed as open wounds. The management goal is creating conditions for healing: clean wound bed, adequate drainage, protection from further contamination and trauma, and a moist (but not wet) wound environment.
Daily assessment: Examine open wounds daily. Normal healing progression: first 3–5 days — clean granulation tissue (pink/red, beady, moist surface) begins filling the wound from the base. Days 5–14 — granulation tissue fills to the skin surface level. Days 14+ — epithelialization (new skin growing across the surface).
Abnormal progression: Signs that the wound is infected or not healing:
- Foul odor or purulent (pus) discharge continuing beyond day 5
- Granulation tissue that is pale, gray, or friable rather than pink and firm
- Excessive granulation tissue rising above skin surface level (proud flesh — most common in horse lower limb wounds)
- Increasing rather than decreasing wound size
Dressing changes: For wounds managed under bandage, change dressings every 1–2 days initially, extending to every 3 days as healing progresses. Each dressing change: remove old dressing, assess the wound, flush if needed, apply fresh dressing. Do not vigorously scrub healing granulation tissue — you damage new tissue.
Managing Proud Flesh (Exuberant Granulation Tissue)
Proud flesh is excessive granulation tissue that rises above the wound margins, preventing epithelialization. It is most common in horse lower limb wounds and occurs when healing is disrupted by movement, infection, or inappropriate treatment.
Management: bandage the wound under firm pressure (compression discourages granulation overgrowth). When proud flesh is present, controlled debridement (cutting back to level with the surrounding skin) is required. Apply copper sulfate powder or zinc sulfate to the surface of proud flesh — this desiccates it and promotes return to normal granulation. Do not apply these chemicals to the wound margins where you want epithelium to grow.
Infection Recognition and Response
A degree of bacterial contamination is present in all open wounds. Wound infection (pathological bacterial growth) is distinguished from normal contamination by:
- Progressive increase in exudate volume and change to purulent character
- Peri-wound heat, swelling, and pain increasing rather than decreasing
- Systemic signs (fever, off-feed, depression)
- Foul odor
Response to wound infection:
- Debride — physically remove all visible pus, necrotic tissue, and foreign material
- Flush thoroughly with antiseptic solution
- Reassess closure status — open any sutured wound that has become infected to allow drainage
- Assess for systemic involvement — fever and systemic depression indicate bacteremia requiring systemic antibiotic treatment
- Increase dressing change frequency
Tetanus Prophylaxis
All wounds, particularly puncture wounds and wounds with tissue devitalization, carry tetanus risk. In unvaccinated animals, a wound is a potential tetanus death sentence. Where tetanus antitoxin is available, administer at wound treatment. Where tetanus toxoid vaccination is maintained, current vaccination provides protection. The priority vaccination if supplies are limited: any unvaccinated animal receiving a significant wound.