Get a sheep
...If I was picking animals on the basis of living-lawnmower potential, I'd probably rate geese over sheep. Although they can make rather a mess...
Geese also tend to eat things like slug, snails, and other beasties which will eat your plants, so they have that in their favour over sheep as well.
I just realised that for one of the components I'm digging out from our component store, I previously used the wrong (newer) devices for the QM (Qualification Model), so I'm going to have to use a mixture of new and slightly older components for the Flight and Flight Spare Models.
At least I can use this as a justification for improving our component recording system (which is bloody god awful at the moment).