When dealing with rats, one needs to reconcile one's desire for organic, natural, non-toxic solutions with one's desire for complete freedom from rats in the chicken coop. According to my neighbor and experienced farmer, Mr. D, you really can't have both. I was resolved to give it a shot, anyway. So I started researching ways to keep critters out of the coop. I think you can see where this might be heading, but let's journey together anyway.
First I tried bird tape and wire mesh. When my husband, Farmer Turnipseed, built the coop for me, we envisioned this fabulous chicken ark moveable coop. I have my pockets of farming in raised boxes. Oh Let me digress for a moment and say that I have major raised box envy. My best friend in the whole world other than my husband has these amazing raised boxes and I want them. Would steal them in fact, but they will never fit into my Prius. Anyway. Back to the coop my husband built. The plan was to move the coop and perch it over the raised boxes and let the chickens make my garden soil so fertile I could grow mutant tomatoes (like my friend with the fab raised boxes). In order to keep out the local fauna, he built a mesh botton on a frame that we thought was rat-proof. We'd been warned by Mr. D that we'd have rats. We should've listened but no, we thought with our new organic farming methods and superior research capabilities and modern technology and hermetically sealed chicken ark we'd be able to escape infestation. Hah.
Apparently, the rats burrowed beneath the chicken coop and squeezed themselves through the mesh on the bottom of the coop, and helped themselves to the chicken feed bounty. Weirdly, my 2 remaining hens do not seem too bothered by this. At least not as much as I am, which is so freaked out that I carry a hoe when I go get eggs now just in case I am ambushed by giant mutant swamp rats. They grow in your imagination.
Our first line of defense, once the mesh didn't work and the bird tape was useless, was to try radio noise. Mr. D swears by this, but for raccoons. It seems to work well for the coons, but the rats either are having a party to my irritating techno station and news, or they don't care. The lure of cracked corn is stronger than the deterrent of disco and static.
Next, when ignoring them didn't work either- they just got more bold and started leaving droppings in the FOOD can- I tried cayenne pepper powder. The kind person who gave me the chickens in the first place and who has a really cool sheep farm (ranch? would you say ranch?) told me that she uses the hot pepper powder in her coop and it works great. I didn't listen. I thought I wouldn't need it. Instead, when I finally tried it I successfully gave myself an asthma attack by breathing it in and inadvertantly wiped it in my eyes -thus igniting a 3 day long crying spree- not recommended. However, the rat droppings in the food bowl dropped off considerably. Apparently the chickens don't taste the pepper powder, but like humans, the rats don't like it in concentration. LOVE that as it doesn't really hurt anyone wearing a full biohazard suit and respirator. So far our rats haven't stolen our apocalypse gear.
However, when my son came screaming into the house one evening- it is his daily chore to put the chickens to bed and gather up eggs- that he'd seen 4 rats in the coop, that was almost the final straw. The final straw came zinging along and zapped me when I was on the deck and discovered rat droppings all around my WINDOW and up my wall toward the attic vent. going INTO MY HOUSE. GROSS. That was it. Total WAR.
My husband bought rat poison, spread it around strategically, I kept up with the cayenne pepper, and we learned that whatever your organic and natural intentions, if you live in an area infested with rats, sometimes you have to use poison. And it works better than anything else.