I have the Cow Elk III decoy, and my only regret about buying it is that I keep leaving the damn thing behind thinking I won't need it, but I have had quite a few encounters now where the elk have hung up looking for the cow that was calling, and couldn't see one. I still kick myself in the ass for leaving it in the truck last fall. Snuck to the edge of a field only to see two younger bulls sparring and messing around, gave them an estrous call, they came about 50yrds closer, but wouldn't commit cause they couldn't see the cow that was calling on the edge of the field. If I would've brought that decoy and setup right on the corner, they would've came right to me I'm sure. (Note to self: BRING THE DAMN DECOY NEXT TIME!!!)