Suspect: Spider Kitty

I am bothered! I think Spider Kitty is into drugs or alcohol. Here are some of the signs and symptoms:

1. He doesn't go home anymore at night.
2. When he arrives in the morning, his eyes are red.
3. He can't walk straight.
4. Always sleeping and feeling 'tired'
5. Everytime I confront him, he can't look at me stright in the eye

Hmmm....I think I have to observe him more and if my suspicions are true, is there any rehab for cats?