My oldest female(non GSD) is very confident and medically okay, but hates when dogs sniff her butt. They get about .02 seconds and then she sits down. If a male dog tries to mount her, she will give them a warning. Needless to say, they learn and don't try it again. Some dogs just don't like this and find it unacceptable. I don't have an issue with mine because she has never gotten in a fight over it, usually she just sits down and looks at them like now what?
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD