A newborn with Diarrhea usually means he has been overfed, but it also can mean he's dehydrated and a vet's assistance should be sought. Fluids are recommended. Try diluting the milk a little with Pedialyte. Constipation can also occur with a tiny one, a doughy feeling belly is a sure sign of this. Be careful not to overfeed and not to feed too quickly.
Newborns grow very quickly so re-check the mark each day for where the tube needs to be placed.
Tubing sounds scary, but in reality it is very easy as long as you watch the mark as the kitten grows and always tube in and out slowly to avoid aspirating any milk into the kittens lungs. M.D. Both Instructions and a complete drawing can be found on page 321. 6. When bottle feeding, allow the kitten to determine the speed of the feeding, otherwise you may drown the kitten by allowing the milk to back up into the lung area. Never force the pressure or speed of the milk flow. Purchase a good scale and weigh the kittens at birth and daily until they reach at least day 21.