If you’re trying the homemade thing, i’d see if your vet has a nutritionist or a recipe plan that they like that is suitable for large breed puppies. You can also use balanceit.com. Are you trying to stay grain free? If not, Fromm gold makes a large breed puppy food that is good for sensitive stomachs. It’s in a bright blue bag.
In regards to the probiotic, my cats were once given Purina Fortiflora. They loved it and two responded very well, one had loose stools (even worse after the probiotic). I gave it a shot for a couple of weeks because it can take time for the good bacteria to colonize. After that I had to find one that had more strains in it, as Fortiflora only had 1. Usually brewer’s yeast is used as an appetite enhancer (many cats can’t resist it) which may be what you’re smelling. The dog formula uses it as well and is also only 1 strain of probiotic.
What kibble foods did your vet suggest?
