During these last several weeks I’ve learned my birds weren’t receiving enough protien in the gamebird mix  I had been feeding . Since I changed up my feed my birds are more alert and they’re flat bodies are getting Fuller like footballs as before , my hens are laying again and this last batch hatched yesterday strong as can be. In the last several months I have had several hens set with a zero hatch rate and now the same hens are hatching as we speak. So my question is the survivors that did hatch during this time are 3 mo old do I cull them and start over or give them a chance?