Start feeding extra food to the runt while he's still nursing. If he's still too young for dog food or he won't nurse at all, you can buy special formula from a vet or pet store and bottle-feed him "on the side." Don't prevent him from drinking mom's milk -- the formula should just be an extra.
What can I feed my runt puppy?
“If a runt puppy is too small to latch on to their mum, your vet might advise you to express her milk by hand into sterilized cup and feed the puppy with sterilized bottle or syringe. Alternatively they might recommend a suitable brand of puppy formula, “ Halloway said.
How often should a runt puppy eat?
Feed the pup with a bottle if it can suckle. If the pup can suckle, you can just feed it every two to three hours with a pet nurser bottle.
What can I expect from a runt puppy?
Well, runt puppies don't receive the proper nutrients while in the uterus. This affects adequate development, resulting in genetic defects or being less fit than the other puppies during birth. Some defects include cleft palates, cardiovascular deformities, and dwarfism coming from the middle of the uterus.
More useful articles on a similar topic 👇
Do runt puppies grow full size?How can I fatten up my underweight dog?