Yes. I would re-run the fecal test at minimum and also test for giardia (it's rare to spot giardia in a fecal test--it usually needs to be sent out to a lab to identify it).
Watery diarrhea is often a parasite or microbial infection of some kind...so I'm suspicious that your dog had more than just worms previously. A round of Metrodinazole from the vet also probably would be worth thinking about -- ask the vet about whether that might help your dog's particular case.
If you're in the USA, Canada, Europe or anywhere else with access to IDEXX labs, I would consider asking the vet about ordering the IDEXX Canine RealPCR Diarrhea Panel. It tests for a long list of potential problems. It's been the key to solving mystery diarrhea in a few young dogs with perisistant diarrhea that I rescued.
The PCR test sometimes ends up being more bang for your buck than just testing for giardia, as it includes giardia plus so much more. It covers Campylobacter coli, Campylobacter jejuni, canine circovirus, canine distemper virus (CDV), canine enteric coronavirus (CECoV), canine parvovirus 2 (CPV-2), Clostridium difficile toxin A/B gene, Clostridium perfringens alpha toxin (CPA) gene Quant, Clostridium perfringens enterotoxin (CPE) gene Quant, Clostridium perfringens CPnetE/F toxin gene Quant, Cryptosporidium spp., Giardia spp., and Salmonella spp.
If your dog has an infection with one of these things, the dewormer may not fix it, and neither will food changes.
Totally spot on.
I had a five month old puppy years ago with the same kind of intractable diarrhea. The vet did put him on metro right away with no result. Nothing was working.
He would fool us and have a round of normal poops, get our hopes up, then go back to the diarrhea.
He tested negative for giardia, which was my first guess. Finally, one of the techs got suspicious and wanted him tested for cryptosporidia, of all the crazy things.
Sure enough, that was it.
The vet clinic didnít keep the meds for crypto on hand, so I had to go to Walgreens. They had to special order it.
The cost: $150 for five pills.
Oh, what the hey. I had already spent $5000+ on heart surgery to close my babyís PDA. Whatís another $150?
My little goofball was fine after that. How he got crypto, Iíll never know.
I, too, give side eye to this vet. Isnít the protocol for puppies with diarrhea to be treated as parvo until proven otherwise?
And an absolute hard no on the Pedigree. Thatís just nuts.
OP, please find a new vet and do the panel.