I reseeded a silage field last year. Took 2 cuts off it this year and put out slurry for each cut. I am now noticing some small docks starting to grow in it. I was going to spray but the problem is that the grass out grows them quickly but there still there but very small. Would ye say spray or leave? Want to try and keep this field clean of docks but know it will be hard since it gets a lot of slurry.