I strongly believe in hardware cloth everywhere,sides,top and apron.Keeps just about everything out.I used to use the netting on the top and 3' down from the top.I did lose an occasional bird due to getting a spur caught in the netting,that was the reason I switched to hardware cloth.It's easy to roll out and nail and is very secure.
In N.H.,Tony.
In N.H.,Tony.
