Hi- I had a cat that pulled out his fur, and my vet couldn't find anything wrong and said some cats just do it, like some people bite their nails. He also said that it could also be a nervous habit, and this kitty was pretty high-strung. It wasn't a real problem, so I chose to do nothing, but my vet had also suggested steroids. I also had a cat that had asthma, and even tho I never took him to the vet for it because it never seemed to bother him much and he was already 13 with kidney disease when I learned he had it. When I mentioned it to my mom, she said she had just had one of her fosters to the vet and asthma had been diagnosed. Being asthmatic myself, I wondered out loud how they treat it - I had a mental picture of getting my cat to use an inhaler! - and my mom said they use steroids. When I said it was just as well I chose to do nothing with Zebo, she said the her vet - who is very well respected, very concerned about keeping up with continuing education, and often speaks at vet conventions, informed her that most cats do not get the same dreaded side effects from steriods that humans do, that in fact steroid use in cats is nearly side-effect free. That's one reason why it is used for so many things in cats that they wouldn't think of using it for in humans. I'm sure alot of people are reading this post with horror stories about steroid use in pets, but of course, no drug is completely side-effect or adverse-effect free. But I really trust this vet (he would be mine except that I can't afford him - his practice is in a ritzy area) and would have no problem with steroid use in my cats if it were ever suggested again. Hope this helps.