We got a 3-4 month old puppy in August, and he has showed positive for hookworms twice, then again for DNA of hookworms. We’re taking another sample this week to see if it’s still showing. The poor thing has been through two rounds of dewormer which made his bowel movements super frequent (in crate while we were at work , etc.). With the DNA, the vet had us give him his second month of heartgaurd, which he was due for. The foster family and his sibling who was with them reportedly do not have worms.
Are hookworms normally this difficult to get rid of? Should I talk to another vet?