Q. Why is my son's cat continually licking her belly to the point the hair is falling out and a sore has developed? She is 12 yrs old inside cat.
A. Many things can cause this such as allergies, auto immune disease,etc. However it could be as simple as your cat is bored or stressed out. Have you had any enviromental changes lately that couild be stressing your feline friend out? Outdoor cats are accustomed to chasing, hunting, and playing with all sorts of critters. Sometimes indoor kitties need added stimulation to keep them "sane". Try gsetting your cat some toys to play with. A laser pointer can be a great interaction toy for the two of you to play with. You can also try getting your fury friend a scratching post or a cat tower that will allow him/her to sit and look out the window. A good product for stressed out kitties is Feliway. Feliway is a pheremoene that mimics pheromones produced by recent mothers to kittens. This product comes in a plug-in diffuser or a spray and is available over the counter at most animal hospitals. The spray form of Feliway can be particularly usefull to calm kitties who get stressed when put in a cat carrier. Simply spray Feliway in your carrier before you load your cat up. If none of the above has worked it sounds like it is time to use this technique to get yourcat into the carrier and to the vet. There they can perform diagnostics such as skin cytologies, allergy testing, skin scrapes to determine what the problem is.
One thing i forgot to mention at the beginning is you certainly need to rule out fleas as the cause. If a cat has a flea allergy just one flea bite can drive them crazy and cause them to lick thier belly raw and hairless. Revolution is a great monthly topicall product for fleas,heartworms, and intestinal parasites. Even indoor cats need flea protection. Good luck!