A friend of mine that has a morkie made a comment about exercising small dogs. I can't remember who it was or where it was she got that info from but when I mentioned I get Magnus to run up/down the stairs for exercise in the morning, she said that wasn't good for him. (In case someone gets the wrong idea, I make it a game of something like fetch. I'm not whipping him to run up/down the stairs..
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The reason it's not good for him is b/c the running would be hard on his organs... Generally, it's not good for small dogs to run. Has anyone heard of this?