great topic. i've always worried about this. there's no way for timmy to get out, but if there were some emergency, say in the middle of the night, and i had to get out immediately, if he didn't have a collar on things might be a it more difficult.
or if i were gone, and someone else had to break into rescue timmy during an emergency, they'd never be able to get him easily without a collar
i keep going back and forth about this. . .