I take very good care of my front yard, lots of time and money keeping it lush and green! My back yard not so much, really just mowing it is all I do. Because of my dogs it is really no use in trying to care for it, but my question is can I contaminate my front yard with the weeds from my back yard when I use the mulcher to mow I know there is usually a lot of grass stuck to the bottom of my craftsman high tunnel mower!!!