Are the senior formula's for certain brands of dog food really that different from the regular formula's? I bought Dozer some food last week and i didnt notice til today that i grabbed a bag that says senior formula at the top. I had already opened it by the time i noticed and it was the same color as the reg formula i had bought the month before. We feed him Blue Buffalo and he does really well on it but i went ahead and gave him some of the new bag and now hes having extreme loose stools. I've already thrown the old bag away so i can't compare the ingriedents but i just wondered if the formula's were really that different?


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