Observe to see if the adult squirrel is acting sick or injured. Look for signs such as bleeding, dragging a limb, limb impairment, head tilt, immobility, patches of hair loss, inflammation or tumors around the head or face.
Squirrels very rarely get rabies, but sometimes squirrels fall victim to a brain parasite called roundworm which causes them to act normally then suddenly tilt or flop over, then act normal again. In some cases, they exhibit signs of neurologic damage. Sadly, the squirrel will succumb to this affliction.
3. CALL
Something is wrong.
Notify a wildlife rehabilitator if the squirrel appears sick or injured. Place an upside-down laundry basket over the animal to keep him/her in place and protected while waiting for help.