“…Fibrosarcomas are found most commonly in dogs and cats, and have been reported in llamas, alpacas, cattle, ferrets, sheep, goats, and horses. 2,7,8,12,13,16,17 Fibrosarcomas are not commonly found internally and are more common in the skin or subcutis with defined predilection sites in dogs (skin, subcutis, oral, and nasal mucosa) and cats (subcutis) with no defined predilection sites for other domestic species. 15 These tumors more commonly affect adult and geriatric animals, but there have been reports in cats and dogs <6 mo of age; a fibrosarcoma of the nasal and maxilla bones was reported as a congenital finding in a horse.…”