I don't think it would 'count' the same as, say a cardio dvd, but it definately counts as much as heavy cleaning, gardening, farm work, and brisk walking do. I count my daily walks as cardio, and they seem much less intense then chasing after dogs!
The only trouble I can see in how you track it, is that the calories burned won't be terribly accurate - but they aren't exact any way. Pick the category that you think it most closely falls into (I'd pick walking at a fairly brisk pace, but farm work sounds perfectly acceptable to me), log your time, and don't futz over the 'calories burned' number.
Life isn't about waiting for the storm to pass...it's learning to dance in the rain.
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