Hi.
We are also having a rat invasion. Never like this before. My DH bought some big rat traps with the spring action. He tried the bucket & water idea but no go. Anyway, he places a wire cage around the set trap and uses a piece of cheddar cheese for bait. The wire cage keeps any other larger animal from getting its nose or paw snapped. He has killed 5 rats so far.
Not sure if you have thought of this scenario with the poison so thought I'd throw it out there for you to mull over. When a rat eats the poison it may wander out into the yard or nearby to die. If a dog or other animals finds it and eats it the poison may kill the animal and/or severely injure its internal organs. Recently this happened to a dog breeder I know. Her AKC champion got off her property when a breach in the fencing occurred from a tree falling on it in the wooded section of her property. She didn't know it until she went hunting for her missing dog. Tragically the dog found and ate something... vet said probably via poisoned mouse or rat. After agonizing weeks she had to have her best dog & friend put down. Since this story is still vivid in my mind and broke my heart for her I needed to warn you about this possibility. Anyway, just some food for thought.
~Dee~
I don't put out poison because I know both my chickens and my dogs eat rodents. Our GSD is obscessed with hunting down and killing the things. Apparently me just leaving out the 1 inch plastic mesh or the bird netting on the ground is as good as a trap for the voles. They are STUPID. I find dead ones caught up in stuff regularly. They can't really chew through stuff like rats. They can dig like champions though. I can't wait until the rains come back and some of those deep holes start filling with water. Those things like to eat the chicken food, but leave everything else alone.