[Jenn H]

Ah puppies & diarrhea. There’s a million causes.
Given that he’s been having to adjust to new environments in his short life I’m going to keep my fingers crossed that it’s just stress/excitement.
To help him symptomatically make sure the rice you give him is white rice. Brown can be more difficult to digest. When you make the rice save the water it’s boiled in and pour it over food and/or give it to drink.
Pumpkin is a great help in relieving diarrhea. 1 tsp/10 #s.
I have also had great luck with probiotics. An easy 1 to get a hold of is Nutri-vet Food Transition. It’s at Petco & comes in packets or tabs. It’s not expensive. Works great.
Then there’s my all time favorite thing and that’s raw goat milk.
When giving probios or goat milk wait 2 hrs before or 4 hrs after meals if on an antibiotic.
If you think he has a chicken allergy you can try giving him organic ground beef w/ the least amt of fat you can get. Boil it like you would the chicken.
I usually get i/d cans when my dogs need to be on a bland diet. It’s a prescription food. But it makes me feel better to add the rice, chicken/beef to supplement the food because then I know it’s balanced. This is obviously a diet that isn’t meant to be fed for too long. Especially with a growing pup.
Ask the vet to hold off on vaccines until his immune system isn’t busy fighting something else or he’s less stressed. Also I personally prefer to spread out vaccines at least 2 wks apart. I don’t do combos. (Except the parvo. It only comes that way.) It’s easier on the immune system and if there’s a reaction I can know which was the cause. And I only do the core vaxx. Understand that I am not an anti-vaxxer. Just not an over-vaxxer. It took me 30+ yrs of raising dogs and other animals to figure out that they don’t need a lot of the stuff we shoot them up with. And the difference between vaccinating and immunization. And what the shots do when an animal isn’t in optimal health at the time they receive them.
Sometimes dogs lick their paws because they have a fungus. That’s not always a sign of allergies. So if eliminating chicken doesn’t help, try looking into that.
Good luck with your new puppy. Congratulations!