It sounds like he needs more days on high IV fluids (diuresis).
The kidneys can regain some function, though there is a possibility for permenant damage. They should do high IV fluids and recheck every 2 days until the kidney levels STOP going down, then send home and re-check to see if he's holding up.
The high BUN can make them feel sick and not want to eat.
Please keep us posted ... keeping the little guy in my thoughts ... |