gnats are downright attracted to icelandics. today i took each horse out for the farrier and brushed and applied bug spray. All of them had a few flies and gnats. Then I bring out nasi. Not one open sore, not even ventril line. He had a swarm of gnats around his belly. Then I bring out fox, hardly any, then Trausti, no open sores anywhere. Same swarm of gnats as nasi! I checked everywhere for any smelly place, dandruff, scaliness, crustyness. Nothing. They just like icelandics better!
-- even good horses have bad days sometimes.