Was she OK on the raw diet? If so I would go back on that and ask the breeder for help.
Often when my dogs have liquid diarrhea I can fix it by feeding them raw green tripe. But you may have to start with small amounts several times a day to make the transistion easier.
Deja, GSD, sable WL, female, born 11 / 2013
Cam, Rough Collie, sable, male, born 8/2015