I looked into importing chickens from England. Besides all the regulations, the price for quarantine is what drives the price up so high. Here are the official regulations:
http://www.aphis.usda.gov/import_export/animals/live_poultry.shtml
Laura, I'm so sorry for your bobcat losses. I hope that she moves on, after raising her young.
We have bobcats in this area. When I first had chickens here, I lost one to a bobcat and I also saw one around the yard a couple times. Now that I only range them during the day, I don't have any more losses. The dogs must scare them off or they find easier prey. I'm still finding carcasses of rabbits etc. near the coops. So some wild critter is choosing jack rabbit instead of chicken.
Those of you who want to scare them off but not shoot might consider one of those Scarecrow sprinklers.