This situation is for the birds.....
This is easy for me, because I'm not in the business nor do I tie that much but it seems to be a no-brainer but I'm not trying to raise any hackles. ;) Your costs for just your feed (I'm guessing your number one cost) have increased by 75%+. When you established your business 11 years ago you established what you thought was a fair and reasonable price for your product and obviously based on the compliments from others about your hackles posted on this web site, your customers agree. It is always difficult to raise prices during inflationary times but it's my guess that your customer base would rather pay extra for your legendary product-line of hackles than see those same hackles fly the coop....
A couple of suggestions as these issues ponder in your head... You've put a lot of time and effort into your breeding program. Have you thought about somehow bringing others along?--somebody to carry on the fine art of raising hackles. So many on this site enjoy engaging in the construction of their own gear maybe some would consider raising a few hobby birds as well. You might be able to keep some of your lines going that way and reduce your cost. Finally, you might consider what so many of the organic farmers do--open up a subscription service whereby interested parties could "adopt" one of your hackle factories--of course the adoption fees would be set to cover your costs and would be determined by fluctuating costs like feed... You could send out little adoption papers over the net with pictures of their adopted bird....Good luck and I must say that it speaks well for you that this issue of raising prices is causing such a dilemma.
BW