flat out! just like as with a mom! and as posted above. Ånd never head back or upside down cuz they'll aspirate and die. and never pump the bottle to force the formula- again, can aspirate- sounds like they took to the bottle ok though. you feeding every couple of hours? Re: the bellies- they need strongid asap. Get it from the vet. mix it in with the formula. Ask the vet if ok to give now but all kittens are born with round worms which eat their food so they get fat from the worms but are hungry more often cuz worms are eating their food!