I suggest with the tiny one especially, to make sure that he is eating well and try to let him use the best teat (the ones near mama's tail I believe are better). If the others seem to crowd him out & even if not, it may also be benificial to give the tiny some alone feeding time to make sure he gets his share. Weigh him at least twice a day to make sure he is maintaining & gaining weight. Good luck, and yes, pictures please!