My little poodle mix regurgitates her kibble whenever I try a new kibble or feed her veggies or fruit, so I stopped doing that. She never got diagnosed with acid reflux but I would call it that or a sensitive stomach. She also has environmental allergies but has responded well to treatment by a specialist.
Carrots are hard to digest, they work as a low calorie snack for some dogs, but it is not unusual to see them in the dogs undigested. So, I’m not surprised at what you described. Actually dogs don’t digest raw carrots but if they agree with the dog otherwise, and in small amounts, it doesn’t harm them. Obviously they don’t agree with your dog.
