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.
Wow, what a difference from here in Sweden.
While cats are are about 70% fixed for dogs the number is MUCH smaller, 7% for females and 4% for males.
But we don't have a wild-dog problem here, leave a dog out unattended over the winter and it's pretty much guaranteed that it will be dead come spring. Cat's seem to do much better somehow.
Everyone knows it's not for doggie breeding, most pets are spayed or neutered.