Flea bite pictures

I have a goat and a cow farm in Omaha. Fleas have been greatest problem in my farms and to my pets. I have tried hell lot of ways to get rid of them but nothing has worked out for me. Initially i didn't know that fleas only causing these bites in my cows. Then later looking at the flea bite pictures in fleascontrol.com, i came to know about it. Now i am trying out the different methods mentioned by them to get rid of fleas.