I rarely see him actually carrying one in his mouth- he's sneaky. I do however find a pile of them around his water bowl. I used to try to wash and dry them near the kitchen sink, but when I would go back to retrieve them, the whole pile had already vanished. So now I just pick them up directly from his water bowl area and put them in my hair. I know. Gross.
So we were out of town all weekend and when we returned I discovered evidence that Davidson had broken TWO of our house rules, apparently at the same time.
1. Don't play with the fish.
2. Don't play with hair rubber bands.
(Notice half of the water from the fish bowl is gone, which means he must have stuck his paw and splashed water around for a long, long time).