Wife and I had it done around lunch time yesterday. She'd had him since a pup (far longer than she's had me), so it hit her harder and she took the entire day off. I went back to work to think about other stuff, then picked up our just turned 3 year old from day care to take him home. At home, we tried to explain to him that Luke had been sick and he won't see Luke anymore, that Luke was gone. He didn't seem to care much, and asked where his grandmother was (who had just spent the weekend with him).
About 30 minutes later, he saw a little
toddler stool on the counter that we had been using as a food bowl platform for Luke, as it had been harder for him to bend over to a bowl on the ground while eating. Son picked it up and put it where Luke's food bowl had been and said, "this is Lukeys". That hit hard.