How old? Ask about reactivity to other dogs, people , cats , or kids. Food aggressions? Resource guarding? Keep in mind that most if not all issues can be worked through. I got my male at an animal shelter, as we were walking out after the papers were signed I found that he was reactive to other dogs. Otherwise perfect dog. I worked with him and he is completely perfect now and I'm happy I got him.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD