being a boxer and pittie lover, i know all about gas-whew!
the probiotic yogurt with the active enzymes helps with gas (i like Activia cuz i eat it too) don't just get plain yogurt cuz that won't do anything. just a table spoon on top of his kibble should help. if not you may need to change foods, even a good quality food can cause gas in certain dogs.
pumpkin is good for firming up loose stools (i know lots about loose stools cuz i feed my dogs raw! whew!) but too much pumpkin will do the opposite. just a tablespoon is enough.
good luck, heehee
Crystal, mom to dogs, cats and a horse
Vegas (5yrs), Georgie the Beagle (around 9yrs), Dora the Beagle ** Forever My Angels Uncle Monty, Olive, Beautiful Beagle Millie, Darling Dudley