weight gain

by Haley Johnson
(indiana)

I have had our 2 year old jack, chip, since he was 7 weeks. He has always been thin but lately its beginning to look like animalneglect. He eats the same, if not more than our other jacks but he won't gain weight. I can literally count the notches on his spine and I feel horrible. He had a worm problem after we got him which took almost 4 months to get rid of but he hasn't had them since. What do I do??