Hi Jonas....I hope the poor baby is doing better. I would also recommend Pedialite ....Gatorade has too much sugar...
I also wanted to recommend that you disinfect yourself.... Change your clothes, bleach your shoes..get a cheap throw rug or carpet remnant, and put lots of bleach on it. Every time you or others in the household go in or out, *especially when you come back in* stand on the bleach soaked rug to clean the bottom (germs can travel there too, ya know) and leave the shoes by the door. That way you don't track it thru the house. Lots of hand sanitizer..every time you touch the dog,(or have been out in public) before you do something else, wash those hands. Also, poor Dookie's system will be weak, so you don't want to bring in anything he can't handle.
My advice would be to just throw away all bedding, toys, food bowls, etc...after this is over...better to be safe than sorry...
Keeping paws crossed