I went to a cutting room a short while ago, they electric cute the hen then decap then pluck, gut & cut, I actually came away and made myself an electric shock line, I'm currently try to build/workout the next bit.
As I understand it the electric shock stops the heart (stuns) they then decap, death (in all about 3 seconds) then they pluck it another 3 seconds, they reckon the electric shock helps the plucking.
According to Defra & environmental health less than 10,000 birds is not slaughtering and therefore you do not need to be a registered house
This thread is good, I didn't expect to get into the ins & outs of it all but it's certainly making me think, hopefully it's helping others look at an additional market.