Do you know every dog in the world? Don't think so. In fact, the dog was almost limping, per se. Like it was forced to be there. Uncomfortable, almost. That is, if dogs could feel human emotions. But they can't. Dogs just feel things and then instantly forget. You can't train or teach them… I talk from a long experience so trust me. They're just animals and don't have a soul like humans do, per se. I’m a big dog fan (I don’t have a dog because my house is too nice) so trust me. Dogs don’t have a soul, ergo, they can’t tell the difference between a baseball and a rock, or anything else. Here, let me translate to you what a dog thinks:

“I'm hungry, I'm thirsty, I'm sleepy” - yup that’s about it.

I'm not quite sure what you're trying to do here but it's not working.