What are some fun things to do with my dogs besides taking them for a walk and play fetch in the backyard? i walk them, i play ball with them and when it's warm outside - they go swimming in a kiddie-pool. what other kinds of activites can i do with them to keep them entertained ...

What is the equivalent distance of running 1 mile in swimming? If I run about a mile every other day and decide to incorporate swimming in the days between, how much distance should I aim for? I know swimming a mile is a lot harder than a running a mile, so is there a thumb when you want to convert ...