He may be fine...but most dogs can't handle too much fat so be prepared to clean up pudding poop. If he does have digestive issues, slippery elm bark(human grade from grocery holistic herb pharmacy section) helps heal the gut. Mix a capsule with some plain yogurt before you feed him.
If he doesn't get sick, that shows he may not be sensitive to food, all good!
Remember over feeding can cause runny poop too...so smaller more frequent meals is recommended for pups.