For my whippet, who is very sensitive when it comes to digestion, I didn't notice any changes between the new recipe and the old one. She is still without gas, keeps the food down... She even ate the new one straight away (I guess that's novelty for you !). Sticking with Purizon for the moment, she can't tolerate the chicken and fish version for example! But this one I'm very happy with, the only reason I've taken one star off is because I don't know whether the new recipe or the old one is better in terms of nutrients.