Hi Lissa,
Those mats can really irritate the poor buns.
S'more got a bad one the other day that was so bad she couldn't sitproperly. Poor bunnie had to sit with her tushie up in the air. And Ihad just checked her a couple of days prior.
I use a pair of blunt-nosed scissors. The blades are VERY sharp so Istill have to be careful. Even being super-careful I still managed tonip her. Her fur isn't that long and the poopy-mat was bad. She hatesit when I have to cut them out, but once she realizes what I'm tring todo she sits very still and lets me. She huff & sqweeks a lotand get lots of love and some treats afterwards.
I tried using a cordless razor/trimmer, but the noise upset her too much.