sorry this could be long...
I am so glad I read this!!!!! But as soon as you mentioned Science Diet my heart leapt greek4. I had been feeding my 2 dogs nutro and they didn't seem to like the taste, so we went on a search for new food, in pet store we saw science diet and the people said that it was good, better that nutro, so we got it. Well.... I went by the guide line feed 3/4 to a 1/4 new food. I did some research on food and well science diet is not what it is cracked up to be, lots of fillers and animal by products in it. we took the food back, Harley has only been fed 1/2 cup of this food in total, and she was very bloated has very smelly gas adn well her poop was runny and gelly. Harley has never had this happen from a food switch, so it could be that science diet is too rich for him, but maybe not. I am not trying to bash science diet as I am sure that may dogs do very well on it, in Harley's case not so much. So we moved to Solid Gold(they finally have it here in Edmonton, I guess there was some border issues) and she is doing very well on it.
I am no expert but just thought I would mention this to you.
nina