Fun Times! With Vida just having a litter I would keep her completely seperate from the other dogs. (as well as her puppies) At this time with her being under peak condition it isn't the best of times to be allowing ANY fights at all. You may end up with a dead bitch over it and have to read the litter yourself. Do they fight when you are there? Can you stop them with your voice? If they fight when your there and do not stop with a command it may be starting to escalate anyways and you may want to just keep them out of eachothers hair. Just my opinion.