We have 9 month Jack Russell bitch and a 6 month old whippet collie cross bitch. In the last 4 weeks the Jack Russell has started to attack the the other younger puppy. It is not all the time, but when she does she is very nasty. The Jack Russell has had a season (She came on heat sooner than expected). They got along fine until recently. The younger bitch does not fight back but submits.I remove the Jack Russell and separate her in another room and ignore her. It seems to work until the next time. She shows no aggression to other dogs of either sex. Any suggestions as I do not want to rehome either puppy.They both will be spade at the end of March due to cost.
Today we had a better day. The JRT tried again only once today, but I pulled her off by her scruff, shook her a little (not hard) while telling her no very strongly. She let go straight away and looked very shocked.She walked away and it’s been peaceful ever since.. I met an experienced dog trainer while walking today and she said it looks like the JRT may have a phantom pregnancy, so we are taking her to the vets to be checked. I have never experienced this before as we have always had more than 1 female at a time and never had any trouble (have had german sheperds, rottweillers, bouviers, bullbull cross and maltese all females and no fighting or aggression to each other). I am hoping that spaying and training will help to relieve the situation. In fact the two of them are curled up together asleep right now!
Hi, I have two Jack Russell Terriers, a male and a female, four years old. They play and to anyone who doesn’t know my dogs it can look like actual fighting. As long as there’s no high pitched squeal the that’s fine.
Ruling that out, it seems like dominance to me. The whippet may be coming into season or the JRT might just be assering herself as leader. sort of like how some teenaged girls think they are superior if they get their periods sooner.
Also, you should not spay until three months after the first season.
I could be wrong.
Hope this helps and good luck.
EDIT; I’m pretty sure there are some homes with two close in age females that do not rehome them.
Some online breed descriptions say do not leave two JRT’S of any sex or age alone together for any length of time. That is bull as mine have been together all their lives and are absouloutly fine. they share a bed.