posted 8 years ago
The idea seems feasible, I suppose, except I have my doubts that chickens would respond to predator sounds, as predators, as far as I know, tend not to announce their presence prior to attack. Chickens will run for cover if a large object passes overhead (their protection mechanism from aerial predators), but where they run to is anyone's guess. Assuming they did run after hearing predator sounds, who's to say they'd necessarily run away from the road rather than into it?
We had a similar problem a couple years back. I think it resolved itself when enough of the chickens got hit and killed. Bad management, probably, but that's what happened. My assumption is that the dumb ones got killed, leaving the ones smart enough to stay out of the road. Curiously, they didn't tend to get hit because they were in the road as such, but because they were in the opposite ditch and would panic when a vehicle approached, running back across the road--and into the vehicle's path--on their way to 'safety.'
Another option might be a good dog. I've read multiple stories from collie owners about their dogs learning the rules of the farm and then enforcing them on their own. After a few times watching the chickens get chased away from the road, the dog picks up on this 'rule' and then does the chasing him- or herself. I've seen this sort of behavior multiple times with my own dog, a collie cross. Presumably this instinct would be that much stronger with a purebred dog. And isn't a dog more fun than Legos?
Other options might be stringing up a quick and easy and relatively cheap chicken wire fence, ugly but good enough to keep them roughly contained, and/or make a point feeding them as far from the road as possible. Scattering whole grains will keep them busier longer than feeding in troughs. It's also quite likely they go to the road for grit, so make sure they have anothert option elsewhere.