My 10 week old puppy has coccidia and is being treated for it. His appetite is OK but he's not interested in treats, should I hold off on training with food right now?

I just got a male 10 week old GSD puppy 3 days ago. He has coccidia and I have started him on the medication the vet recommended. His appetite is decent not voracious. He is lively and healthy. However, I wonder if I should hold off beginning high value rewards for marker training until he finishes the medication? At the moment Zuke's small cookies do not interest him enough.