What ever you have will be fine. Chicken meat should be cooked. I especially like fresh raw beef liver and cube it up into about 1/4 inch pieces. I like to take treats like this into the run or walk, sit down, and feed it a piece at a time to make sure that every chicken gets his fair share.
Why should you be shocked that your chickens love meat?
Chickens are the one animal on Earth that is closely related to a T-Rex Dinosaur so it would be natural for chickens to eat meat, and a lot of it.
By definition not only are hen eggs organic, but hen eggs are also free from gluten, and completely lacking in Lactose despite being in the dairy isle at the supermarket.
Don't be fooled by that ".....and Natural or All Natural" label. The castor gland aka anal gland of a beaver supposedly tastes and smells just like strawberries and beaver castor is Organic to Boot.
Don't get your hopes to high however because beaver castor is much much to expensive an...
If it walks, flies, swims, crawls or takes the Taxi, then it is chicken food.
Some animals however can harbor disease organisms that can be passed on to your chickens but your birds will eat these species anyway, especially if you free range your poultry.
This is why I worm all my birds 2...