I just started using nibble nets about 3 weeks ago. Great hay bags. I choose the 1.5 inch holes on one side and 2. Inch holes on the other side. Stiffer hay needs the bigger holes, softer hay needs the smaller holes. I attach the bag to a wall or panel at the top and bottom. I'm totally thrilled with these bags. Very little waste and less hay getting worked into the ground making muck.