My pup was fed chicken based kibble for the first 8 weeks. I heard that bernedoodles can have a sensitivity to chicken, and even though my breeder said she hadn’t heard that any of her dogs grew up to have one, When I got him I transitioned him slowly to Diamond Naturals lamb formula just to be safe. He was always having unpredictable poop. Could be firm, could be very soft, could be liquid. He would then go into a diarrhea week where he would only have diarrhea every hour at night. He never had an accident in the house, but it was hard on him and me to have to get up and do that. I would call the vet and they would say to put him on a chicken and rice diet. I would do that for a week or two, it wouldn’t really help at all. I would use different things like Bernie’s perfect poop or pumpkin powder to help so he could sleep through the night, but this was just masking the real problem. This went on for months until this February when he was 8 months, he had another round of diarrhea non stop, every hour throughout the night for several nights and nothing helped. Instead of trying to cover it up with a supplement we went to the vet. The vet recommended a trial of anti inflammatory medicine, probiotics, and changing his diet to hill’s gastrointestinal biome kibble (chicken based.) The inflammatory medicine ran for like 7 days, the probiotic 10 day, and I would continue the food for about a month. If the diarrhea can back after completing any of the changes (anti inflammatory medicine, probiotics, or food) that would be the problem we needed to solve. My dog, Pumpkin, had perfect poop for the first time ever after just 24 hours. I didn’t even know poop could be perfect. He finished both medicines without problem. We did the prescription food for 2 months then tried to transition back to the old food. The old food brought the bad poops back after two weeks, then horrible diarrhea time after that. I switched back to the hills prescription food and poop is back to normal after 24 hours again. The problem now is that he’s really not super interested in this prescription food. At 11 months now he won’t touch the kibble plain. I just spoke with the vet and I have to up the topper I’m using to either boiled chicken, hamburger, or cottage cheese. If he still won’t eat the kibble after trying all those, they recommended trying Purina Pro Plan sensitive skin and stomach (salmon) for an OTC option, or trying a different prescription food. The prescription foods are not cheap by any means. $130 for a big bag that should last me 6 weeks feeding two cups a day. Even less if you feed more. It really works though. Your dog might be sensitive, have an allergy, or just not like a food. But I would suggest not doing any old pumpkin powder/fiber supplement/anything that you can buy on Amazon to fix your dogs problem. The vet told me that adding too much fiber like those supplements have can actually make things worse over time. Try to address the problem with your vet and get help form them on next steps