I have had my senior dog on Origen for 2 weeks now, after years of Iams and a couple of dry food bags from Nutro. I thought it was best to try a brand that wasn't cereal based, had by-products and preservatives. The first week on it was fine, but this second week, I am beginning to wonder if it is right for my dog. Two positives with this food is that my dog doesn't have anymore ear infections and he stopped eating his own poop. Downside, he has AWFUL smelly gas, and often will have runny greenish/black poops. Either it is taking a while to adjust or it isn't agreeing with him. He also seems to have less energy.
Curious to hear feedback on other senior dogs who are on Origen senior formula.