I have a weed growing in a bed in my yard (Horsetail). From my research I have found out that this is a very hard thing to get rid of. Unfortunately it has begun to spread in my lawn and into another vegetable bed that I have. I don't want it to get much further, but from what I am reading most weed killers do nothing for this. Has anyone ever dealt with this weed before? Any suggestions? (I have pets and don't want to expose them to anything toxic in my yard.) Thanks.