I have these terrible looking weeds growing in the backyard where my fire pit is located:( I have put small gravel down on the ground it looked really nice at first but now I have these unsightly terrible looking weeds growing through the rocks do you know something that would get rid of these weeds?? will using boiling hot water work? Or vinegar? I have a cat that roams in my back yard and freely eats the grass and I do not want to use any type of chemicals that would harm my pet in anyway? Please someone help me out here it is really creating an eye sore. Thank you in advance:)