Help! We just took in a rescue dog (our third one in 5 years), a
small terrier mix about 1-2 yrs old. He's been to the vet, had all
necessary shots, is worm-free, has normal appetite, bowel
movements--but is skinny as a rail and has not gained an ounce after
one month! As well, he seems just a tad lethargic for his young
age. At first we figured it a function of his being homeless and
food deprived, but after this length of time and many different diet
efforts, we're at a loss. Any suggestions, ideas?