Keep in mind that when he could hear, we found him 9 houses away and had to call him out of the bushes.
Maybe he knows he's disabled, remembers that there are cars out side, so I shouldn't worry as much. But maybe he's just as stupid as he's always been. It's hard to make sure mistakes don't happen, but I worry that he is as likely to die from being hit from a car as some disease brought on by old age or complications from his hyperthyroidism.
I'm glad to still have him around, in any case.