Hmm....the same guy has been munching on my orchids as well. Look for snails...darn things. One got to my neofinitia (ahem, vanda lou sneary now) before the buds even opened leaving brown icky edges all over my pretty flowers. Pick up pots and look underneath. They hide in the shaded cool wet places. If it keeps happening, repot. They could be living in the potting medium. Good luck...your flowers are gorgeous! This is one of my favorite oncids...gotta love that color purple!