A Bird's Gotta Chew what a Bird's Gotta Chew

While out of focus, this photo should nonetheless display the result of gnawing by budgies.  We put clothespins in the cage to hold treats and greens.  The budgies like standing on them, and chewing them.  They also like chewing cherry and maple sticks which we use as natural perches.  While many budgies love chewing cuttle bones, ours never have done that with much enthusiasm.  Perhaps that is because they eat "Egg-cite" (we are not making this up), as seed and pellet mix which has calcium in it.

It is clear that the female budgies do a lot more chewing and gnawing then the males, or a least with an F, N=2 and M, N=1. I wonder if this is related to their nesting instincts?  They have whittled any number of perches down to, literally, nothing.  It is clear that budgies would quickly destroy a wooden cage.