I seem to remember someone recommending Infusium 23 or something...Rory is matted on her chest - above and below her collar, which she wears most of the time - but I think they will come out if we work at them. I bought a human spray in conditioner, one that you spray and leave in. I wasn't game to use too much yet though. It seemed to help with combing out the matts, but I thought I'd check before going gung-ho with it!