I found a great site on the net comlete with step by step piccies - I liberated a brand new traffic cone just after the floods in November,

Then I cut it into 2 pieces & both hang from the milking machine bars in our derelict cottage - the smaller end is for the chooks, the larger base is for the turkeys..... the birds go in head first & it stops them from flapping around - a well placed turkey wing can break your cheekbone just at the wrong time!
The heads hand down from the cone & the birds are actually very calm. I got a pink stanley knife to cut the jugulars - again, I took advice to let the birds bleed out - it's very nearly the halal method, & I never leave the birds to 'hang' - I process straight away & then leave them to brine overnight before cooking the following day.
I *think* that if the birds are NOT bled, then that is what can make them quite 'gamey' - talking to a couple of folks who do their own birds a lot, they have complained that the meat is dark or strong - but they go for either the head chop or breaking the necks & let them hang, so I will stick to my method, seeing as how it works for us.
The long term plan is to have our main flock for the eggs & the offspring for the table - any members of the main flock that might need to be shown the door later on will be for the slow pot, I think!!
Definitely not bad for a nearly 50yr old townie!!