Introduction and I have a problem weed

Hi, my name is David and I am in Eugene. I have a flower and veggie garden on my 5 acre farm with my wife and 4 labs. My pony has a pasture to himself. Lately there is an infestation in this pasture with a daisy-like weed. Can anyone identify it? Better yet, how do I get rid of it? It is crowding out the grass and it is getting worse. I recently found this site and I love it. I am still learning about gardening and I feel I have some knowledge I can share as well as learning from all of you. Thanks!

Welcome David! Four labs and a pony, it doesn't get much better than that.

See if you think it might be Mayweed; there are some photos at this link, and it is noted to be invasive. Also medicinal, and also helpful to adjacent plants- so, what to believe?
http://davesgarden.com/pf/go/291///

LOL alot of people like to make a tea out of it, helps ya sleep...
it smells good too.... only not in the grass.
Looks like Chamomile to me. Make sure you save some for later.

Viv

It sure does look like Chamomile...I wish it would make me sleepy!!! Never any luck!