It might be close to molting, as tarantulas fast before their molt, sometimes for a few weeks, as you described.
If you suspect any injuries, put it in a small tupperware container or a glass bowl or anything transparent where you can see the underside without pinch-handling, which would aggravate any injuries. Be very careful and gentle when moving it into the container.
Also, how can a cat move an enclosure that easy? I'd suggest putting books around it/on top of it so kitty doesn't do anything silly again.