Yes, runts can and often will grow to match the size of their siblings. Whilst it is possible for the runt to remain smaller than the other puppies even when fully grown, it quite normal for them to catch up. Once they start receiving the proper attention, runts will grow.
Will the runt of the litter always be the smallest?
Since it is unlikely that a litter of pups will all be the same size almost every litter will have one pup that is noticeably smaller than the rest. As a breeder, you may need to help feed runts for them to reach a more normal weight.
Is the runt always the youngest?
False. The theory that the runt is positioned in the middle is based on the fact that the uterus of a dog is shaped like the letter "Y." The belief is that being in the middle positions the runt farthest away from the nutritious blood supply necessary for normal development.
Do runts make good dogs?
Is a runt puppy bad? Many dog breeders believe that a responsibly-reared litter of puppies shouldn't have any runts. Abnormally small puppies who are likely to suffer health complications in future, or could pass on congenital problems if they survive and breed are often euthanized at birth.
More useful articles on a similar topic 👇
How long do runts stay small?What can I expect from a runt puppy?