Years ago I found a home for a teeny-tiny dog that had been neglected. I told the people who adopted him that I’d been calling him Speck.
They thought the name fit him well and kept it. At a party later someone asked where his name came from and they pointed out that I’d named him. The guy then asked me what the name meant and I explained I’d named him after Richard Speck, the dude who killed nurses. You could hear a pin drop.
I think Rocky does suit him. You probably don’t want a joke name like Killer. Mouse might be a little too small for him, I can see in his eyes that he’s big on the inside.
He has survived a lot I think. There are signs that he was outside a lot (or always), which is not a great thing here. It’s very hot and we’ve got a lot of predators, but he survived and someone cared enough to get him help.