Catteleya Hybrid dropping green leaves, is this normal?

[wilson79]

Thank you all for the advice! I will get a picture up of the roots tomorrow if I can find the time. To my beginners eye they seemed to be in bad shape, which is why i've been letting it get a little dry. Is there any solid reference or guide to what roots should be cut and what should be left? I dont want to ruin it by being too aggressive.

Good tip on petstores by the way, I wouldnt have thought of that! I'll be checking that out as ASAP.