The bigger one is 4 months, i think the younger are maybe 8 weeks?I know you probably said, but I must have forgotten; how old are these bunnies? I warn people about Jersey Woolies: "They start losing their baby coats and growing in their junior coats at around eight weeks, and for about the next six weeks you will wonder why you wanted anything to do with them. Some seem to mat up within minutes of being brushed. The good ones will get over it; they have enough guard hairs in their coats that they simply don't mat except maybe a little "on the seat of their pants." The bad ones, though, have soft cottony coats, and for them, life is one long "bad hair day."