Just curious... I'm still a long way off as I won't even get my chicks until March so I won't need an answer to this question for many months... but I was wondering if I could use a mason jar chick feeder with a base like the one pictured for oyster shell and grit (separate feeders) when the girls are big? My family gave me a few for Christmas (once everyone knew I was planning for chickens apparently I became easy to shop for!). I was thinking it would be nice to have a use for them after the chicks become chickens.