Horses are expensive. Here in horse country I have a good friend that realized that they couldn’t afford them anymore as they got older. They didn’t replace when they died and they live a long time. They also used to do mastiff rescue but big dogs expensive and they don’t live very long so quit when the last one died. Now they have 2 cats. They want to retire some day. For us it was realizing how much money we were spending on our 5 rescue dogs and vets here are super expensive. We have 3 now. I think sometimes our goals change out of necessity.