Well your first problem is ...3 males, 1 female. Together for life or not, this is a problem. Unless you have 2 NEUTERED males. The males will be fighting over the female, which stresses her out. The constant mating of 3 males on her is much to handle. The stress could cause her not to eat. You need to pick one male, whichever you see her most happy with perhaps. And remove the other two. They will not get depressed over it. The males will still have each other and the female and male will have each other. It wont matter if he;s the dad or not. All that matters is those other males are out of the territory and not stressing her out. It would be like a gang bang on a human female.....not a happy situation. If you don't remove the other males, she and her babies could die. Hope this helps.