Oops, I responded before I saw your last comment. Diarrhea, eh? And Thor is your Doberman, right?
Dobermans are prone to gastrointestinal upsets. Not all are, but some. One of my dobies had diarhhea her entire first year. It was being caused by a bad tooth the vet missed. Tooth came out, diarhhea stopped that same day.
She occasionally still has it though. I am pretty expert on dog diarhhea. You can use Immodium AD. The plain kind, no other ingredients in it. I can look up the dosage, I have it written down at home for my 75 pound dobies. You should probably check with your vet first.
Of course canned pumpkin is supposed to help, too. I've used that a time or two, but didn't think it did all that much good.
If they get diarrhea a time or two, I do nothing, but if it continues, I'll give Immodium AD for a couple days. If there is still diarrhea I would check with my vet. I have never withheld food, like vets will tell you. Just can't bear to do it. But I do feed the bland diet, mine consists of brown rice, boiled hamburger, cottage cheese with unsalted green beans and chicken breast added. I moisten it with the water the hamburger was boiled in, after I chill it and skim the fat off the top.
Actually, I feed this bland diet every day as a dinner treat, Canine Caviar dry food is available to them at all times whether they have diarhhea or not. I might restrict some of their treats if they have diarhhea. Or not.