Aren't they funny? That's part of what we love about daycare - they go at 7.30 and I pick them up at 5.30 and there are always about 25 - 30 dogs there. So they're there, belting around, playing, wrestling, digging, swimming, dancing, rolling, rough-housing - for ten hours!! It provides stimulation and mental exercise as well as just tiring them out physically. It satisfies them to their bones, in every way, and we'll never, ever stop taking them. They go on a Friday because that way we can go out on Friday nights and not feel guilty!
PS - I've often thought...can you imagine a kitty daycare?? Mayhem! There is not a spittier, hissier, snarlier, scratchier, more emotionally charged place I can imagine!