-meat birds
-layers
-chicks 3 weeks to 1 month old
-guineas 1 month old
-juvenile guineas 3-4 months old
-Ducks
You have quite a mix there. I’m not sure if your meat birds are Cornish X, Rangers, or dual purpose cockerels you are growing out. That could make a difference. How much they forage or what “treats” or supplements you feed can make a difference too for all your birds, not just the meat birds.
Young guineas need a pretty high protein feed when younger but eventually they can eat a lower protein feed. Supposedly at 4 months is when that protein level can be cut.
It is generally recommended that about 4 weeks of age you take chicks that will become a laying flock off of high protein Starter and switch to a lower protein Grower, maybe 16%. Some feeds recommend 8 weeks but some go with 4 weeks. That cut-off is not rigid.
My understanding of angel wing in ducks is that the problems occurs when they are growing. The joint does not grow correctly. Once they have finished growing their skeleton a bit higher protein level or some extra calcium should not cause a problem.
I understand many people believe you need to cram all the protein you can into out birds. They think you are being cruel if you don’t feed high protein levels. I’m not one of those. There are special circumstances when a higher protein level is called for, raising show birds for example, but the vast majority of birds do very well on a diet that is about 16% protein. That included guineas, ducks, and chickens once they reach a certain age.
I don’t know how you are set up as far as housing or how much they forage or get treats. With you mix you may need special housing for the guineas, chicks, and future ducklings until they get to be a certain age so you can feed them separately. Then there are the meat birds, whatever they are. But if I had your flock I’d be feeding all the others a 16% protein feed that is not Layer and offer oyster shell on the side.
