It's hard to swat mosqitoes with your horns. We've had frequent rains and warm humid weather this year --- and biting insects! I've not even been putting Scout in the yoke because it restricts him from swishing flies. We've been settling for some walks when we can find some breeze --- and that's been rare.
Scout the x and Peaches the pony get some relief from the biting insects by going in the barn. The window fan with the light blows into my shop and runs 24/7. The spent bugs and bug parts that get sucked in are beggining to form drifts on my work bench. We're hoping for an early frost.