You should make it more tailored (but not explicitly mention that) it's for dog owners to meet each other. For example, meeting other "friendly dogs and dog owners" or something like that. Everyone knows it's not for doggie breeding, most pets are spayed or neutered.
"most pets are spayed or neutered" {{citation needed}}
Of course when a single female cat can make over a dozen kittens per year, this is still not high enough to avoid the obvious problems.