my female is 4 yo and her 2nd litter 1st time 1 puppy was dead. this litter she had 4 1 lived 1 day its been 3 days now she tried to bring 1 into our bed she would not let me put it back in box she put him back but when i went to she if he was ok she grab him out of my hand he is the smallest of the 3 they including mom are all sleeping and eating now is there something i should be concerned about need help actually im fist time breeder and only her the 1 female thank you for your help just don't want to lose another one