I am so sorry LinZ. I will be hoping and praying with you that they turn up, sometimes (often) these little critters can find a way out of a pasture that a horse won't bother with. I hope that was the case here. BUT, take Joe Boy's advice. Call any and everyone that could possibly be a help in finding them. Brand Inspectors if your state has them, Sheriff, police, sale barns, newspaper if you are a small community might be good, state ag extention office. Anyone and everyone. Now, don't wait. I lost 15 (some e.t.) calves this spring. I'm still really, really mad about it. Probably has saved someones life that I don't know for "sure" who did it (well, not really, but I am really cranky about it). Call everyone you can think of. Good luck.