if you insist on not taking him to the hospital....

take him off solid food for 24 hours. very important because his stomach needs to recover.... it sucks when he goes to his bowl and there is nothing but its best for him so just do it.

give him a 50/50 mixture of water and pedialite. this is the most important to keep him hydrated and restore his electrolytes.

for a smaller dog, give him 1/2 of a pepcid tablet. average to large dog, give him 1 whole pepcid.

if he is shittin, give him a childs dose of immodium (liquid with an eye dropper is obviously the easiest way to do this...)

late entry: i had to go through this with my dog this summer but it carried on for a week +.... we took her to the vet and the above is exactly what they did for her, she came home as good as new.... and i came home $360 poorer.