strange and odd behavior
So, my cat, Lucky, I adopted him back in 2006 from the animal shelter. He was really shy and timid when I first got him and as soon as I set him free in my house he hid under the treadmill for 2 days. I love animals so I spent most of my time trying to get him to come out. On the third night he moved behind the computer desk and I managed to get him out. I carried him upstairs and put him on my bed, but as soon as I let go he bolted back downstairs. Later that night as I slept, my arm was hanging over my bed. I suddenly jerked my arm and I heard a scattering sound and it was Lucky. He came back upstairs and was watching me. Ever since that night, we've been inseparable. He stays in my room mostly and only comes downstairs when he's looking for me.
Anyway, he was old when I got him, about 7 or 8 maybe. The people at the shelter said his last owners got rid of him because their baby was allergic, but I think they abused him. He only has half a tail. He often bites it. He used to bite it so bad that blood would splatter onto my wall, but that's stopped. When he bites himself, he usually suddenly bolts off the bed for some reason.
Also, a few months ago I left for college. Whenever I come home on the weekends, Lucky comes and finds me and he won't stop meowing until I spend time with him (at least over an hour). Even after that he constantly meows for my attention, even when we're laying in bed together. Does anyone know why he does this?