hi there sory to hear of your problems. if your vet has checked her out it should not be too serious. however the problems with the bowel movement and diet could be quite serious especially as you do not know your puppies history, please be aware of liver shunt which can cause problems as you discribe and also lead to dietary problems, try a low protein diet as this could help.if you have contact with the previous owner ask them. also if they had your baby insured and have the pedigree you could follow this up as this illness is caused by inbreeding. i hope this is not the case as i have 2 yorkies and have owned 4 all together and they are beautiful pets. let me know as i am a concerned fuzby owner
pauline