Change something in a dog’s environment and this happens:  “Whoa! Wait a minute. What’s that? That’s never been there before. I don’t think I like it. I’ll just creep up on it and get a closer look. Whoa! Still don’t know what it is. Maybe I need to smell it.  Gotta get a little closer. Do I dare? Oh. Yeah. It’s just a plastic bag. Hunh.”

Make the same change in a cat’s environment and this happens:  “Wow! Look at that! Could that be fun? What is it? Doesn’t matter. I think I will wiggle my butt and pounce on it? Yup. I knew it. That was fun. Let’s do it again.”