Theoretically if you feed cockerels, Drakes, male quails etc only layers pellets they might have problems with their kidneys because of too much calcium. It wont kill them instantly but they might live shorter than drakes fed properly.
Females would obviously extract the excess calcium in the form of egg shells.
I do feed my bird layers pellets, but they also get other feed like kitchen scraps, free range slugs, garden greens as they free range.