The Vet Gives the A-ok
The shelter workers suspected that he was the runt of the shelter. This means that the puppy is the weakest pup born into the litter. Mothers know this and suspect that the puppy is not going to live long. This is why they reject that pup from the start They focus most of their maternal affection on the other puppies.
When the veterinarian conducted tests and investigations, he concluded that nothing was wrong with this puppy. At least, not on a physical level because Benji was perfectly healthy. He was well developed, and there were no congenital anomalies or other pathological conditions.