Destroying an animal only leaves his territory open for another animal to move in. If an animal appears sick, call Animal Control so it can be removed safely and be evaluated by a wildlife veterinarian. If you think a young animal such as a deer, fox or raccoon may be orphaned, wait 24 hours. Leave it there even if someone has touched it. It is an old wive's tale that the mother will not take her young back after humans have handled it.
Maternal instinct is strong.
The mother may be nearby, so stay away. Keep the cat indoors. If after 24 hours the baby is still there and appears hungry or cold, call Animal Control. We have the equipment necessary to handle wildlife safely. The same rules go for fledgling birds.