The Lavender has exciled himself for the past week each day. The others go one direction with the younger boy to free range, and he spends the day alone elsewhere. Right now he is with my goat bucks.
I gave him a good look over. He has an old broken toe, he's had that since a young lad. But his feathers are sleek, clean, and well preened. I could find no injury or wound. He moves normally when walking. He eats and drinks, and takes offered treats. His eyes and nose are clear, no signs of abnormal respiratory patterns or sounds.
In other words, he appears healthy still. I know sick birds can isolate themselves, but he doesn't appear ill. Any thoughts? Is he just becoming a loner?