this morning, i've founf a couple big clumps of fur on the floor, one in the kitchen, and one in the dining room.. i've never seen clumps this big come off of him before. they look almost like they had been cut off with scissors. i don't see a bare spot on cujo, but he's been really hyper and wiggly so i haven't been able to look him over super good. he seems to be acting normal. should i be worried about these weird clumps?