We have a Vetgun and it does a good job for 2 - 4 weeks. Not a long term solution unless they have made advances with the vetcaps. You'll need to fire the vetgun around your cattle a few times to get them use to the sound of the gun. Then you can start with the cattle. We haven't had ours to run off when they are hit with the capsule. They will slightly jump but that's all. If you get one, just make sure you are in a good range to shoot the cattle so the capsule will burst. I have had a couple to bounce off and not burst due to being too far away.wacocowboy":2s9xjkio said:I do pour on and IGR and still but it is a pain to pen them everytime the pour on wear off was wondering has anyone tried that Vetgun? I am scared I will spook them and they go run over every fence