Oh, I'm sure there've been times when mine would have flipped me off when they could. ;o) Not while out walking, though. I'm the one who could use lots of energetic walks. Between 'em, the dogs get in plenty runnin and wrastlin.
My current pets do fine so far with browsing on dry food always kept available to them. (It's a shame the same strategy doesn't work for me!) Once the lab gets thick-bodied, as they tend to do after a few years, I may have to adjust the food or amount.
One thing I've noticed with Purina's Indoor Cat Formula, my kitty doesn't hack up furballs at all, and her coat is medium-long. Very nice.
Gidget's gotten plump in the last few years... she no longer eats alot, it's just her age and metabolism, like me I think :~D