Up until now I have used a trailer with stock type sides that did not let down. The new trailer has the openings/doors that will drop down so that the horse can stick it's head out. I do not want to go down the road with the horses heads hanging out. If I keep the doors up then there is a small sliding window that can be opened. My question is: is that small window being open going to be enough air for them while we are on the move? I'm not sure how much air actually flows through those slide back windows going down the road. It gets upward of 100 degrees here in the summer with almost 100 percent humidity. I do not stop and just let the horses stand in the trailer when it's warm, I try to always keep moving so they get airflow, and I don't usually go far.
I would feel better if there was more airflow but this trailer does not have the bar grills in place after the window/door thing is down. I looked at getting the drop down doors replaced with a different model that had the bar grill attached and it was quite pricey. Could I get some sort of net/mesh to cover the openings and attach it? I don't see any sort of rings to do that so how could I install those?