On paper, unless your chickens are ultra-rare show types, I wouldn't have though it was worth it - you're still going to have to pay a £35 excess and virtually every breed I can think of in this country can be bought for under £35. Up to you though! If you're keeping a treasured pet, I suppose you might think it's worth it. I have friends near Edinburgh who paid over £900 for surgery on one of their ducks...