history: I like to help at the animal shelter walking the dogs. They get a chance to get out of their cages and be with a nice human like me. I like to help at the animal shelter walking the dogs. They get a chance to get out of their cages and be with a nice human like me. That is really nice of you! I am sure they appreciate it
current: They do. They get to smell the grass, they play they get their exercise, they get to have fun, they get to be a dog! 
next: They get to enjoy themselves and have a good time! :)