I have a german shepherd along with my yorkies and chi. The only real problem I had was Cash ran over precious causing her to hurt her back (shes totally healed now) she had to stay confined for 3 months.
Im always very cautious with them but one time I let my gaurd down and this happened. He ran her over while coming inside from outside. I never let them outside together because he doesnt realize hes 90 lbs and the one time I didnt pay attention she got hurt.
Other then that one time I have not had any other problems. Hes really good with them
Nikki loves to sit on top of him
http://i12.tinypic.com/2i9jogk.jpg I tried to upload the pic here but it wont let me