Orphaned puppies

Question
I had to remove a litter of puppies from the crawlspace under my home, their mother was a stray, looks to be a full blood weimeranian. Animal control could not catch her, she will not take the puppies back since I've removed them. Animal control told me that if I turned them in without the mother they would be euthanize and the SPCA is not equipped to deal with puppies so young. They look to be about 3 weeks old.  One of them was separated form the other two and I feared it may be sick so my neighbor agreed to care for it and I took the other two. That one died yesterday from what looked to be parvo from the blood in it's stool. I've been doing the best I can to raise the other two but I can't afford store bought formula for them. I've been keeping them clean and I'm feeding them a recipe of Milk, eggs yolks, a bit of olive oil, pinch of salt, a crushed kids vitamin and I have not yet been able to get puppy chow so I've been using bread or cheerios for a filler. They seem to be doing well, they are growing, having healthy looking bowel movements and have very healthy appetites. So I was wondering if it's possible for one puppy in a littler to have parvo and not the others?
I know all that wasn't nessesary to ask that question but also looking for any other advice you could give me.
Thank You.

Answer
Hi. I don't think that only one pup would have parvo and not the others. It could've been something else that caused the bleeding. Anything at this age can be traumatic. It's hard to say without an autopsy. If the two left are doing well, then I wouldn't suspect parvo. When you can, the pups will need to be wormed. You can buy the stuff at the vet, or at the store. I know raising puppies is expensive, and you're doing a great job at keeping them going. Just keep doing what you're doing for now, but in a few weeks, they'll need to be put on dog food. If they'll eat it now, then you could go ahead and switch them over. Good luck, good job, and if you have anymore questions, feel free to ask.