Is it safe to give just turned 4 week old pups pumpkin? Can they handle it at that age? Having diarrhea issues and probiotics are not working. If so...how much pumpkin?
I would run a fecal first and see if there is a problem. Were they wormed yet? Or did you just start them on solid food? Either or both can be the issue.
Many folks give Tylan. That's where I would start. Doubt it has anything to do with worm.
It's no wonder our dogs immune systems are getting so screwed up. I hope "many folks" don't follow this policy. Probably the same breeder that routinely sends puppies home with Tylan in their food.
Had the same issue at around 4 weeks. I gave them baby rice mixed with a little bit of baby chicken for a couple of days. Sometimes I mixed the baby rice with a little bit of pumpkin. Stools went back to normal. They just needed to give their digestive system a little soothing break.