That's a relief..thought they were Syrians! It can be hard to introduce the new baby males to an adult even if he is the dad, and particularly after he has not been in on the raising of the litter. Even experts sometimes struggle to match them up and if they are not females the male may not accept them. I would be very, very careful if he is trying to bite them. Try babyboos suggestion but if he attacks them it is probably best to keep them separately.
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