Figure S1. Severe bite wounds to the hindlimbs and perineum of a Labrador retriever. Crushing, avulsion, and devitalization of underlying tissue occurs with dog-on-dog bite wounds.

Figure S2. Radiation induced chronic ulcer in a canine oncologist patient. This photograph shows a large nonhealing ulcerated lesion over the shoulder (head of the patient is toward the left). This patient had previously received adjunctive radiation therapy for treatment of a soft tissue sarcoma following excision. This ulcerated lesion was successfully treated by prestretching of the skin followed by excision of the lesion and primary closure. Photo courtesy of Dr. Lillian Aronson.

Figure S3. Feline chronic axillary wounds. (A) A large nonhealing wound is seen in the right axilla of a cat. This patient had been found as a stray more than 1 month prior and therefore the inciting trauma is unknown. Over the course of the month, the general appearance remained unchanged. On presentation, the wound displays poorly vascularized granulation tissue covering its surface and showed little to no evidence of contraction and epithelialization. (B) A chronic axillary wound of 1.5 years duration in a cat adopted from an animal shelter. At the time of rescue by the shelter, the cat was found with a flea collar embedded in the left axillary region. Photos courtesy of Dr. David Holt.

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