Yeah changing food quickly while stressed, eeek!, will have to ride it out now. I still say if you can get the probiotic paste off your vet it could really help. That is the first line of defense from my vet, pumpkin never works for my girls and one won't touch it. Glad you are getting a stool test. Confine or not is up to you, the ability to go in and out would be nice for the dog. Can you put the crate in the bathroom where the floor is easily cleaned?
Primal, minus eggs, dairy and a myriad of other allergens.