One weird thing about Manni is that his legs always tremble when he pees. If he's lifting his right back leg to pee, his left front leg trembles. And vice versa if it's on the other side. We mentioned this to the vet and she didn't seem concerned about it, but she didn't offer any explanation. I've poked around on his legs to see if he's in any pain, but he doesn't seem to be. I'm wondering if anyone else's dog does this. I just don't know what to think about it.