Ahhhhh, how could I forget about gout?? I was aware of that (deep down xD) but more so meant what is the actual number that is too much protein for a chicken.
I think people should do their own research. I'm on the internet, how do you know I'm trustworthy? If you do your own research you can decide if you trust the source or not.
If I'm telling the truth, I found a source that I trust that says gout can be caused in chickens by too much protein. So that is one data point. I have never found a source I trust that says a lesser amount will never cause a problem, whatever that problem may be. It could be something totally different from gout.
In that study they fed a 30% protein feed. Over time, some chickens developed gout. Not every chicken, but some. That was at 30%. If they had run the test at 28% or 29% would some chickens have developed gout over time? I have no idea. I have not seen any results from tests with those numbers.
if someone has defined a maximum protein amount (as in, this will cause articular gout for sure)
Since some chickens in that test at 30% protein developed gout and some did not, I cannot say that 30% will cause gout in any one specific chicken. It will in some. It will not in some.
I mentioned my goals. I do not raise chickens for show, many who do feed relatively high levels of protein as they are rewarded for size. If you are raising them for meat you might want to feed them a higher level of protein that I do. Some people like to feed their pets a high protein diet. For some people these answers are always black or white, always or never. In my opinion I think we need to decide what the limits are for ourselves.