Gharib
I want Khilafah back
Becaue the dog probably doesn't know about the potential health risks, and so isn't truly of "good enough mind" to decide. If it were just fine to go ahead and act on your desires regardless of whether the participants want it or are capable of knowing better, then there would be no argument against rape, sex with minors, mentally handicapped people, bed ridden people and so on, no matter how they felt about it.
still it gives you no right to deny the persons rights on his sex life.
what if the dog is asked about it and kind of gives a confimation to it by a dogish acceptance?