For those following along, the allergist says Joey isn't allergic to anything. The improvements we saw with the prednisone are not connected with allergic anything. The rash he's had since the day he was born is "follicular"- it seems to be following his hair follicles- and isn't itchy, so that's not an allergy. According to the allergist. He says to give the kid eggs, and if the rash comes back, pop an anthisthamine into his mouth, and if he gets better in 2-3 hours, then call the doc back; but otherwise, just tell our docs.
I did tell our docs. They told me to make an appointment with the allergist.
And so it goes.