Sherry, you might want to take the dog to the vet just to make sure it isn't pancreatitis. Although I don't think the dog would be drinking so much water if he had it. It's just to be on the safe side.
I found out the hard way that dogs shouldn't be fed pork when I gave my dog the leftover pork tenderloin. He ended up with a severe case of pancreatitis and he had to hav an IV and antibiotics for three days. It could have costed me up to six hundred dollars or more, but when I told the vet what he had eaten and how soon he got sick after. The Vet let me take him home administer the antibiotics myself after he incerted the IV. It still ended up costing $200 but the dog got better, thank God!
As for a good chew toy. You can buy those ropes for dogs that have nots in them. Mine seem to like them anyway. Just make sure not to give them old shoes because they will think it's ok to chew on any and all shoes in the house.
I hope your dog is feeling better soon.