pedialite is better than water for keeping a dog hydrated during tummy upsets. (if you cant get pedialite, disolve 2 teaspoons of sugar in 16 oz of water, not quite as good because theres no electrolites but the sugar will help)
remove all treats and kibble and give nothing but pedialite for about 3 hours, (to give the system a chance to clear a little) then give a small meal od boiled chicken and white rice, its so bland it shouldnt upset the stomach and the rice will help bind. some white bread should also help.
if you have childrens kaopect a little of that, about 1/4 of a teaspoon full will help ease the upset and calm the muscular contractions.
if puppies still got diahrrea in the mornign give your vet a call, they will probably give you "doggy pepto" as we call it (its a kaopect for dogs) and a srynge and the exact dosage...
stay on the chicken and rice for 12 hours after normal poop returns, keep up the pedialite for about the same amount of time and then SLOWLY start readding kibble back.
Hope your baby feels better by morning!
and welcome aboard Ruby