Or you could use clear panels like THESE! My guess is that most of your shop owners customers used a HEAT LAMP for extra warmth, which at the same time gave them more LIGHT. That would explain a lot of things, including the misunderstanding on what was helping them lay!Thanks! We get rain often, but it might snow (more like sleet) once every 10 years or so here. haha The only worry I had about closing off that end is that it will probably block out the sunlight, but I guess if I just block off the top part at least some light should still be able to come through.