A little more info from a rancher:
we use borax near doors but that's for other creepy-crawlies. I've never noticed ticks trying to come in.
I use Advantix on the dog (which is the scariest of tick-killers as it also repells A LITTLE) but it should not be used with a small child that may nom on the dog! That said, I still pick 3-6 ticks off the dog every day.
We had chickens, ducks, geese and turkeys 'graze' in the lawns as well as nearer to their houses/ barns. I think it did help but be aware, you'll have a lot of fresh poo out there. It's fertilizer, never bothered me much (as a kid, I was usually barefoot and you'd just wipe it off on some cleaner grass).
It depends on the level of infestation. Since we're literally in the middle of nowhere, it's very bad and that's why we *will* use pest control. It's no guarantee but it works much better than daily tick removal (except the dog still gets out in the forests, out of the yard). Even with poultry out there, they are still there.