Ethel has been a bit of a hairdresser for a while, sneakily munching on the odd bit of hair when she grooms Nellie. Over the past few months she has taken it to a whole new level and so Nellie is rapidly looking less and less like a sheltie; she is also now trying to barber my two sheltie babies whenever she gets the chance. She will also eat any clumps or strands of hair she finds lying around the hutch. I have seen the vet and had her checked for any physical health problems, she is in a large indoor home with lots of enrichment, I have added branches etc to give her things to chew on, but she is still munching on hair whenever she gets the chance. Does anyone have any suggestions for anything else I can try? (Ethel is the boss pig of a herd of 8 girls, Nellie is second in command but never challenges for dominance)