Carrying large boxes

When I moved to Ashfield, we got some chickens. They are free range in an area of about 10 square metres. We also let them loose in the backyard on occasion. 

For feed, I get vegetable leaves which are thrown out by fruit shops. I usually ride to Leichhardt, about 3kms away and get a large box from there. 

The box on the front rack is about 900mm wide, and 450mm deep. Fits perfectly on the cetma rack :-)