
Mmmmmm
How old is he, and what cant he eat?
Personally i really dont rate Hills science diet at all (the vet i used to do part time weekend slavery for would not feed it too his dogs, adn only stocked it for a couple of ladies who wouldnt feed anything else. He never once reccommended it to anyone!)
Could you consider feeding a raw diet?
Yoghurt is good for upset stomachs, the live stuff with the bacteria in, it replaces the bacteria in the gut and stuff, so that they work effectively.
There are also loads of herbal things, Tarragon, Marjoram, Basil, Oregano, Thyme Coriander, and Dill are all beneficial to the digestive system. What i do with my lot is offer them a selection of the above, and they like all of them, but dont always pick out the same ones each time.
At the end of the day, if he was mine, id feed a raw diet, which without all the chemicals and antioxidants, carcinogenic compounds, and al the other rubbish, is much easier on the digestive system.
But, its what ever you feel comfortable doing, If you are interested, read Dr Billingtons 'Give your dog a bone' about the barf diet. I find him a bit patronising, but never the less, i cant really pick any major faults with what he says.
I would say though, its more likely to do your dog harm if he is overweight rather than underweight!
Em