"I'm here for the horse - to help him get a better deal".
I try to follow that philosophy.
A fairly typical method in operant conditioning is to simply observe the animal and when you see a behavior you want, you mark it with a sound. Then you reward it as quickly as you can. The term used is "capturing" a behavior."
When the trainer "captures" a behavior with a marker and reinforces that behavior with reward, where is the aversive?