I have one spayed jill and one castrated hob and a whole jill, The spayed one and the hob were happy as larry all summer but the whole jill left in season did not seem that happy she lost a lot of weight and obviously didn't seem very comfortable so next year I may get her spayed or jabbed rather than leave her job done then. Saying that now the winter is here she has put on the weight again and flying around the yard. My spayed jill turned out to be a cracking worker mind but not the end of the world plenty of ferrets about if I ever need a replacement