Argh! Just learned my All Flock feed has the same calcium level as layer...

[CrazyTalk]

The damage done to roosters is drastically less than the damage done to the kidneys of growing birds. I'm of the opinion that feeding layer to roosters is really not a big deal. The studies feeding roosters high calcium vs low calcium show no statistical difference in the formation of uroliths - roosters seem to get them whether or not they get high calcium.


The studies on feeding it to sub-adult birds are pretty convincing though - very high rates of kidney, liver, and urinary tract damage.