My dad always said you didn't get rats and mice in one place.
We have had a major problem here, some people have a barn nearby and some time ago they branched out from sheep to keeping pigs as well, in the barn. I'd noticed the rat holes in the lane outside their barn, but they said you couldn't use poison where you had pigs. result was about 3 months ago I noticed rat holes appearing under the hen hut and in thepolytunnel, things got worse when they were obviously up round the house, OH opened the garage door and one ran across, luckily went outward instead of in. I did have a word and they said they were putting bait down after I'd first mentioned it, but the rats weren't taking it. (prefered the bakery waste)
So far I've spent £50 on the stuff, but I hate putting it down because I've since seen cats about, cleared 6 dead rats, though they are supposed to go in their holes to die. Bait not going as fast now, I just hope they are clearing them up there, it seems they are feeding them and they are spreading out to our place.
Sorry to go on, but this has been winding me up for weeks, can't tell anybody round here or it may backfire