Answer:
Making rules that are in concordance with spaying and neutering
Step-by-step explanation:
The "no-kill" movement tries to reduce the number of pets entering public animal shelters, where, historically, large percentages of the pets are not adopted and wind up being killed, by encouraging people to spay or neuter (that is, surgically sterilize) their pets and thus reduce unwanted litters.
Making rules in concordance with spaying will definitely improve spay rate