About a safe weed killer. Charlene, thank you for the comment on Corn Gluten Meal. To read more about this, visit here. Corn Gluten Meal is a preemergent weed killer which means that you can put on your lawn early in the year, before there are weed roots and it will help control weeds. It doesn't effect plants with roots like your grass, it actually acts as more like a fertilizer at that point. COOL! I am totally giving this a try next year...I just have to remember to do it. There was a post by another corn gluten meal user who said her dogs would eat more grass shortly after it was applied...at least you know it's not covered in chemicals if they do.
Kim, I'm so sorry to hear about Cosmo (Cosmo is the pug with a soother in his mouth on our photo contest banner) (yah, I know, it hasn't been around for a while...it's summer!).
And well, heck, it you don't kill the weeds, maybe there's nuthin wrong with a lawn full of yellow flowers.