www.millbusters.com is a FORUM that has advise for you.... but for you to report a Mill - PLEASE write AND CALL your local ASPCA ... the Humane Society...actually - ANY Agency you have in your town for the Prevention of Cruelity to Animals - You also could call the local cops - they can direct you to the best place to contact and GOOD LUCK ...
I can't stress that it only takes ONE PERSON to get the ball rolling and you never know the power you have in reporting these awful mills - It's WELL WORTH THE TIME it takes and EVERYONE should report a suspected mill if you see one !! Good for you !!