5 days after whelping is not good for her to be having the runs 4 times a day. I think that you should contact your vet.
My girl has always been solid practically the next day after eating all the after births and then having goats milk in the morning and evening, so I would say that there is something not right here.
Continue with the fish and chicken with rice to help to bind her, make sure she is having plenty to drink and just get in touch with your vet, glad that the pups are ok, but if she has an infection you don't want it passing onto the pups, so please just get her checked over, the runs 4 times a day is no good at all.