I tried a moo cow decoy last year and it seemed to scare them more than help. I think if u get one get the montana buck antelope decoy if hunting the rut. I found that if I kept a low profile and paralleled the antelope it worked better than the deoy. Io tried flagging and decoying, but the only thing that worked for me was slow and steady with no quick movements. Good luck hope this helps. Feel free to send me a pm on my hunt and we can talk more