Well, it's not as simple as him not wanting dry food I guess... within the past day and a half that we've had him, poor Lancelot has undergone lots of problems. After I posted the original message, his health quickly went downhill.. it was so sudden. The first bowel movement he had was diarrhea, so we knew something was already wrong, later that day I found tapeworm segments on his behind and in his other bowel movements, so we assumed that was the cause of the diarrhea, lethargy, light vomitting, and lack of appetite. Went to the vet to have him looked at... she says more than likely it's just the worms combined with a new environment and stress.. she said there's a slight possibility it's parvo but that maybe we should give him the tapeworm, anti-diarrhea, and anti-nausea medication and see how he does overnight. We brought him home and the only thing we managed to get down him was the tapeworm pill with a little bit of cheese (that's the last food he's taken). As the night went on, he got more and more lethargic it seems.. he still took water, but nothing else. I stayed up all night wondering what I could do.. spent all night online looking for suggestions. Then finally, since I couldn't sleep anyways, I went to Wal-Mart at 4 in the morning to pick up some different foods for him to try and an oral syringe in case I had to force some water down. Saddly, none of the food enticed him.
This morning I woke up and things had gotten even worse. He would barely move at all except to vomit or use the restroom and he began vomitting all the water he drank. I called the vet and she suggested crushing up the anti- nausea pill in water and forcing it down.. so I did, but within an hour he had vomited it all up. We decided it must be parvo for sure, so we took him back and sure enough, it is 
I haven't eaten, slept, or even showered since we brought him home. I've just been so worried about the poor little guy. It just upsets me so much. As if his life hasn't been painful and hard enough.. going from puppy mill, to pet store, to owner, who gives him up to the humane society, to us. He's so young and should have had so much life ahead of him. If only his last owner hadn't taken him to that shelter, he wouldn't have gotten parvo and worms and god knows what else. I've been looking forward to getting a pet dog for over a year now, and took great pain searching for the perfect doggy to adopt. I wanted to adopt so as not to encourage breeders or pet stores to continue what they're doing, so I found Lancelot on petfinder and sent in my lengthy adoption application and a long cover letter I wrote esp. about and for him. They chose ours out of 5 applications they had for the lil fella. I was so excited. We went to the store that night and bought everything we needed for him, I even dug up some of my old stuffed animals from my mom's house.
Anyhow, I'm rambling, but I'm just so tired and it hurts so much. I can't count the number of times I've broken down over the poor guy. It was so hard to watch him in pain.
So the dilemma.. am I awful for not having him put to sleep? Should I want to "relieve him of his suffering"? He's so young and sweet.. even though he was deathly sick and could barely move, he'd still manage to wag his tail when he heard our voices. I just don't want to lose him, not after waiting so long, and not before he can enjoy his new life with us and his new home. We have everything for him and all the love in the world to offer him. It hurt so bad to leave him alone in that animal hospital.. I hope he doesn't think we've abandoned him like so many others in his life have.
He'll be in there a while I imagine. All they can do is try feeding him through the vein and try keeping him hydrated. The vet said he thinks he has a good chance of making it, since he's a little older (6 or 7 months), his temperature wasn't all that high, and his coloring still looked good.
I don't know why I'm going on and on. I guess I could just really use some kind of encouragement. I feel like any decision I would've made would've been a bad one. I just don't believe in giving up when there's still a chance though. I may have only had him for less than 2 days, but I already love him more than what may be reasonable.