just got a nice silver hob and jill ferret from a mate,put the hob in a hutch by himself no problem,tried jill in with unrelated jill, promptly proceeeded to try and kill it,had it pinned in nest box, released scent glands and really wild,the jill is about ayear old,gave the jill to another mate had same trouble,personally never seen or had this problem with jills before,any ideas as to why.