How can we keep kangaroos away?

Large reds don't have any natural predators, so they fear nothing. Ticks also live in long grass and that's where dogs usually pick them up. Short of yelling out "Paaa, where's the gun !". You'll have to keep your dog away from the grasslands and wash her regularly with a good cattle wash, it won't hurt her, with been using it on our bluey for years. Or create a fenced off pen and keep the grass mowed. It's only the white ticks you have to worry about and they don't jump long distance like people think. Remember the roo's have been here for a lot longer than any man and have more of a right to feed on the land than we do. If you're from the south, the smaller greys are scared of eagle, a small solar powered mp3 player connected to a loud speaker, continually playing a screeching eagle will keep them away, but won't solve the overall tick problem.