I'm sorry to hear this. I never knew that short haired cats could even get matted. This is one reason why my two new boys are short haired. My only slightly overweight cat is Ziggy and she hates to be brushed or combed. When I do it, I have to muzzle her because she will growl, hiss, and try to bite me. Luckily she so far she hasn't matted at all. Now both of my senior boys have decided to stop grooming themselves so are now getting kennel cuts which is shorter than a lion cut from the groomers. Sky has to take a sedative pill before he goes because he's become a real terror. I've asked the groomers what I can do to avoid the matting and they just said to use several different types of combs to help break up the mat. Now Alani is also matted a little bit on his back sides because he's lazy not overweight. I have to muzzle him and comb them out. I do have a very small scissors that I use if I have to but I always put a comb in between so I won't cut the skin. My only option if I can't take care of the matting is to take my cats to the groomers because my vet hospital doesn't do any kind of grooming. They have shaved Ziggy's butt in the past though. Good luck.