I have a jack russel female turning 8 in dec. A choc lab femalw turning 3 in aug both have been sterilised. They seem to fight lately. 1st time over a toy took it away and dumped it. 2nd time a toy again dumped it. 3rd time I never heard them hubby just told me to clean the jack russel. Sat it was bad hubbys hankichief fell and they were at it. I ended up with stiches had to take the jack russel to thd vet. I dont want to get rid of either one.