Parvo home medication for my dog, he has a ball of liquid on his neck.?

It sounds as if your vet sent home bagged fluids for you to give under the skin? If this is the case then what is going on is basically gravity. Fluids in the body not absorbed quickly will always seek the lowest level. The fluids are just under the skin above the muscle and are being absorbed by the body over time - they will go down and then disappear. You can always call your vet and listen to the message on the answering machine. If referred to an emergency clinic then call and seek advice. Or call a clinic near you and they can also advise. Should not be a problem. In any case - call the vet in the morning and let them know.

You really shouldn't be doing that yourself. A vet should. But even when my pups get their annuals, there is always a small bump where they got the injection. It's about half the size of a dime and goes away after about a week. And it's slightly difficult to believe no 24 hour emergency vets are open right now. Unless of course you live somewhere with 25 hours in a day.

If it's the subcutaneous fluids, it's completely normal for it to travel around under the skin - it'll move and gradually absorb in. A little leaking at the needle site is also quite normal.

Wait an call your vet in the morning. I realize their are small towns that don't have emergency care. But make sure you call in the morning. Good luck. How long has this place been on your dog?

I'm not sure if this is the same but my dog had the same sort of thing. She got it during her heat (before she was spade) and the vet said it might be a health problem. They were wrong though. They found out a month later it was just a heat thing.