The problem with exercising your dogs on a regular basis, is that they start to INSIST on that exercize.
I was taking the shuttle to work for about 2 months and during that time my dogs didn't get their normal amount of exercise. When taking the shuttle, I leave at 6:40 so didn't have time to take them to the park before going to work. I come home at 5:30-ish and am too freaking tired to take them anywhere so they just got to play/train in the back yard.
I felt guilty all the time so I left the back door open. I could tell they were running in and out of the house because the carpet got dirty (well dirtier - time to get it cleaned again) and my yard started to become a disaster area. And most importantly, my dogs just didn't seem as happy. Yeah, it's probably my imagination I couldn't help it.
So I no longer take the shuttle. Maybe I'll take it once in a while, but not on a regular basis. I can take my dogs to the park in the morning again and by golly, they are way happier! And Polly looks like he's in better shape, which probably means all of my dogs are - I just can't see it on them because of the fur. Or maybe I'm just way happier (I'm not in better shape though). Either way I'm not saving $400/month like I was taking the shuttle but being happy is way more important than saving a few bucks!
I've been back taking them to the park in the morning for about a week and a half and they are back INSITING on it. Speaking of which, I have a boxer on my lap right now, so I had better take them out.