How about rice and yogurt? This is what we used with our sickest fosters. The yogurt puts back good bacteria they lose and rice is bland and binding. Maybe diaper ointment or zinc oxide on the bum? I would ask the vet about that though. I am a people nurse but that does not help with pets!! Sorry about Bramble!! Hope she will hurry and get over this worrisome trouble. Seems like soemthing that is recurring, eh? But the bloodwork shows no illness such as parasites, etc??