I wouldn't think anyone could answer this question.I used the feeders that the birds can't get into (the trays with the cut outs for just their head to get into)and scratch the feed out,but they still do.I cleaned my pens weekly and I think I threw out more feed then they ate.I always have feed available,never letting the tray be empty.
I have a question on the  1.6 oz per bird.First of all 1.6 oz per week is a very small amount of feed for a week.Was the 1 bird fed by himself?Or with a colony?In my opionion,a single bird in the pen will not eat as much as a bird from a colony.Does this amount of feed all he has to eat?Or is it fed treats as well?
In N.H.,Tony.