http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/160702.htm "Wound Lavage (flushing/cleaning) Irrigation of the wound washes away both visible and microscopic debris. This reduces the bacterial load in the tissue, which helps decrease wound complications. Assuming the solution is nontoxic, the most important factor in wound lavage is use of large volumes to facilitate the removal of debris. The recommended lavage is a moderate pressure system using a 35-mL syringe and a 19-gauge needle that delivers lavage fluid at 8 lb/sq in. The use of antibiotics in the lavage fluid is controversial. The ideal lavage fluid would be antiseptic and nontoxic to the healing tissues. Although isotonic saline is not antiseptic, it is the least toxic to healing tissue. Surgical scrub agents should not be used because the detergent component is damaging to tissue. Dilute antiseptics can be used safely. Chlorhexidine diacetate 0.05% has sustained residual activity against a broad spectrum of bacteria, while causing minimal tissue inflammation. However, gram-negative bacteria may become resistant to chlorhexidine. Stronger solutions of chlorhexidine are toxic to healing tissue. Povidone-iodine 1% is an effective antiseptic, but it has minimal residual activity and may be inactivated by purulent debris. "
The following EXCELLENT article is not restrictive to the chicken but is equally applicable (remember this when certain medications are advised or a condition such as crop burn is addressed in the article which usually occurs with handfeeding crop technique ) http://drexotic.com/avian_emergencies.htm covering: Respiratory emergencies Upper Airway Obstructions Bleeding and Blood Loss Anemia Bite Wounds Fractures Burns / Shock / Poisonings