UGH... this has happened in these parts time and time again.
I actually have 2 elderly New Zealand's who absolutely refused to be housed in the barn, and refused to be caged. They literally go ape crazy.My husband built them a hutch, it is 10 ft long, each rabbit having a 5 ft section, each section 5ft deep, and the whole hutch is prolly close to 7ft tall..
We also have raccoons, possums and armadillos, LARGE ones. The raccoons have actually climbed my bakers rack by my back door and rattled the door knob.
I can honestly say, to my knowledge, the 2 in the hutch have never been disturbed by the raccoons for one simple reason. raccoons don't like light. It is a proven fact they are light sensitive. Hence why they are listed as nocturnal animals. The hutch is actually in between 2 barns. we run an outdoor extension cord to the hutch, and suspend one of those clamp lights to the roof aiming it down toward the buns. We usually put in a 20 watt bulb during the warm months, during the cold months, they get a heat lamp. The clamp lights run around 6 bucks. It provides a measure of security for your buns, the raccoons hate it, and you can see your buns from the house.
As for the skittish buns, I actually have a radio with mine, mine really aren't skittish. They use to be, they would get scared if the wind blew, and if the dogs really barked, they went crazy. Try putting one of the Wal-Mart $10 shower radios with them out of their reach for a spell, the noise will sooth them and they wont be so jumpy from every little noise. They just went through a severely traumatic experience. Nothing soothes ones nerves like a little Mozart. Just tried to avoid any requiem music..LOL
As for your hutch.. I am not knocking you, if that's all you've got, so be it, but security is essential. My rabbits actually have keyed locks on their doors.. you;d be amazed at how intelligent a raccoon is...
We also keep lights on the small pigs until they are too big for the raccoons to get ahold of. I cannot stress ENOUGH of the security measures that need to be taken to keep raccoons at bay.
Zin