I understand bullies will be "lazy" stubborn and all that...but my puppy(9 months) is lethargic and has had diarhea off and on for a week. we got a new puppy in March, which they love to play. I was sure if maybe he was feeling a little jealous and it was upsetting him physically. He's not always lethargic, he'll get a burst of energy and play with the other one (which i know is typically) but when he's just lounging around, he disappears off to a corner. I feed Harmony Farms, which is a grocery store food, but I was surprised when I found it b/c the ingredients seem a lot better than blue buffalo. Am I over reacting here?