He knew; it was his time to go to the Bridge and no force can stop that. You did everything you could for him while he was part of your life, you loved him and that was the most important. He knew.

I'm sorry for your loss, RIP to your Bubba, and Peace to you-remember, he knew love because of you. Play well at the Bridge, Bubba. All the PT kitties (and those that went before PT) will be waiting to greet you.