I don't know. Aren't sand fleas large enough to be seen?
But no matter what they are, I need to get rid of them without hurting the chickens. I'm sure there are plenty of poisons I could use but since the chickens are out in the yard a lot, I think they would get the poison in their system.
I am having what most feel is a mites issue. They aren't effecting the chickens but drive me and my granddaughter batty with the itches. You can't see them but they are there. I even get whelps on my hands from handling the water hose or picking up things from the ground. The whelps go away...