We are trying to get the garden cleared off and we are going to start mulching now for next year. We are saving our feedbags from rabbit and chicken feed. Our dog food bags have plastic between the layers, so they wouldn't decompose very well. Question is, will the feed bags decompose well if they are just laid on the ground, wet down, and the compost materials piled on top of them? Should we instead tear them up, or will they be fine just left whole. I would say they would be about 6 layers thick left as they are. Any thoughts?