Appetite and Worms

If a dog loses his appetite, but still has plenty of energy, then are worms the likely explanation? We just got a new puppy who had worms, so I'm thinking my older dog picked up worms from the new puppy. The old dog will still run a quarter mile when I take him out, and he doesn't seem any more lethargic than he normally is when he's at home.

Is loss of appetite a symptom of worms? He still eats, but only scrambled eggs and Evo biscuit treats.

no, loss of appetite is not usually a symptom of worms. if he's not eating, i'd get him checked by a vet. better safe than sorry at any rate.

Diarrhea is a common symptom of worms.