My 15 week old birds have bigger waddles than my 19 week old birds

[3chickchicks]

The only difference is the 15 week'ers (Wyandottes and definitely pullets) were strictly on feed until a week ago. The 19 week'ers (Dominique and Buff Brahma) have free ranged since they were 8 weeks old (with feed available).

Does feed make them develop much faster? Or maybe it's the difference in breeds? The younger birds are smaller. Just weird.

 

[themenagerie]

If it makes a difference, my Wyandottes seem to have had more pronounced wattles at younger ages. It worried me that they were roos, but luckily they were just girls with redder/bigger than average waddles than the other breeds.