When we picked our pup up from the breeder (8 weeks) they told us he had Giardia. I believe he was given Flagyl and Panacur for this. The next day we took him to the vet and were told he had Coccidia as well. We talked to the breeder and she found it hard to believe that he had Coccidia because none of her other pups have shown any sign whatsoever. Should I be concerned?