Barclay went to a friends house to be boarded for a few days while we took a little trip, and when I got him back he had spent lots of time playing with their dogs, and probably having his neck chewed on, and now he has big mats behind each ear. I normally watch closely for mats and brush out any little knots I find starting, but by the time I saw these they were past brushing out, they are like little balls of felt! What is the best way to remove these? I have a small shaver I use for trimming hair on his paws and between his pads, but I have never used it to try and remove something like a mat. Is there anything I can put on it to help loosen it up or make it easier to remove? I don't mind if it leaves him with a little bald spot there, I just want to remove it in the easiest and most painless way for him.