Mustard Greens are a popular item in my aviary now.
My favorite way to serve greens is to hang them in the border show cage. With the show cage attached to their regular cage, borders love to play going in and out and putting the greens in the show cage gives them the opportunity to enjoy Eating Out!
Regularly at least two enter the cage at one time only to take turns nibbling on the mustard greens.
So instead of putting those Border or Fife wire cages away till next show season, hang them on your regular cages, regardless of the canary variety, they all love Eating Out in the Show Cage Diner!