I remember we had a lovebird that liked to fly free in the house, but he landed on an "Old Man" cactus we had. The poor thing kept hopping from one foot to the other, trying to pick the spines out of his feet while the other foot was hurting because of the spines in it. I felt sorry for him, but the spines were too small for us to see easily to help him, and I couldn't help laughing because it looked so funny.