dowel hoop frame for garden netting

We've got a balcony planter, and I've been growing strawberries in one end for a few years, but last year the birds discovered it. One bird seemed quite taken with them, so she came back this year and built a nest in a neighbor's bush just to be near them, I think. So this year I went to Plantasjen and bought a fitted sheet of netting, with elastic meant to hold the netting over a metal frame which can be attached to the standard-sized wood garden boxes that they use in Norway: https://www.pl