yoour puppy is very lucky .I am glad he is in a safe, and loving home. He could have passed away easily with all that he had .Poor Paxton
I think he will be just fine after he is treated and feeling better. The anemia was a result of the parasite.
Tiny pups do not have a lot to lose, and when they get parasites it sucks the life out of them.
Can one of you post pictures of Paxton?