1. Puppy Chow is garbage food; shame on you for feeding it;

2. I don't know what Wormaway 7 is, so I can't tell you anything about it unless you post the active ingredient and how much per-mil it is dosed;

3. What is wrong with the pup is he is not being fed good food and his heavily-parasitized on top of this.

4. I also don't know if the wormer you're giving is toxic to pups, nor being given at the right dose, because you didn't provide me with any real information on dosage or mg/ml of the drug you have.

5. Many pups try to eat out of "the other pup's" dish, that is normal.

Jack