A cat has to undergo surgery for a small tumor, but the owner said she was not very friendly. The vet and his assistant will find out quickly by trying to give her an injection with a little sedative.. The feral cat will bite and scratch the assistant. End, the animal will be anesthetized in a box using anesthetic gas, a method commonly used for birds and other small animals. The assistant had to go to the hospital to be treated for the bites and scratches caused by the wild cat..