>>8009
For the chickens, while I was still growing up (and therefore growing in penis length and girth as well), massaging their cloaca open and inserting a few fingers inside to no egg was present was plenty to fit comfortably without lasting harm to my avian lover. Keep in mind that penetration is always uncomfortable for poultry... I believe they think they are laying an egg! Expect lots of spasms as you fit yourself inside. >>7763 roughly shows the reaction of a penetrated chicken, plus lots of frantic clucking.
By the time I was (mostly) full grown, I was too large to fit inside all but one of my chickens. I killed some of them this way. It's not something I wish to repeat.
As for the turkeys, while it was still rather uncomfortable for the bird, the aforementioned foreplay was enough to ensure intercourse was possible without lasting harm. I made a mistake with one of my turkeys and accidentally killed him. He was the submissive male in the group, so without him the other toms had no real outlet for their aggressive behavior. Definitely a mistake on my part that I was careful not to repeat.
Funny story: I believe I have actually somewhat deformed my penis by participating in avian bestiality while I was still growing. It has a somewhat smaller tip than girth and the right side curves slightly to the left, whereas the left side is completely straight. It also twists somewhat counterclockwise when erect and completely flaccid. I think this has to doing with the peculiar anatomy of avian reproductive organs, but I'm no veterinarian, it's merely a pet theory of mine.
Overall, while it was a pretty fun way to discover my own sexuality I don't think I would recommend it to others. You will definitely get bird poop on your dick and if you are well-endowed, you are likely to kill the first couple of avian lovers unless you are really careful. My advice? Stick to dogs.