I have shaved my parents cat because of the matting. Her coat grew in wonderfully. I then shaved my Smokey and wish I would have never done it. He now has a different feel to his coat. It feels like some of it didn't grow back out and is shorter and sharper then the rest of his coat. So I suppose it all depends on the cat. It does take a new blade each time I shaved one and only lasts one cat.
I used to shave our persian twice a year he had something called acne and that matted his fur so bad it was like when I sheved it it all came out like a blanket.. He was much calmer when I used the shaver then when I used the sisors (spelling?) Try shaving if it doesn't work then either you take her to the vet and let them do it or try yourself with the sisors. Still I don't think it should be a problem, But Merlin might just be a easy cat to shave he pretty much enjoyed it. I also shaved a girl I found dirty and skinny and yucky outside, her fur was like gum. she looked so miserable so I took her home and cleaned her up, she was also fine with the clipper. And she wasn't mine and she had probably been abused by the looks of it. her fur grew out like wileys cat but after a year when she had put on some wieght and looked pretty beautiful her fur was fine as well. I accually gave her to her new home about 2 weeks ago :)
Wiley: the cats fur grows back slowely not untill about a year after you've shaved will the fur be completely the same and soft.
If you think dogs can't count, try putting three dog biscuits in your pocket and then giving Fido only two of them.