Q.Did I just kill my Vanda?
I saw a video that said I can cut the top off the stalk of my Vanda, as long as I left about 5 rows of leaves below. I took the top 1/4 off the plant. It is not happy and is now giving me yellow leaves on the bottom and top. Did I just kill this plant?

Certified GKH Gardening Expert
It will recover, there is no need to worry. Pruning them won't kill them, but I would suggest doing this in spring, and not this late. It will probably suffer for just a bit before recovering just fine. A picture can help me to see the damage, though.
This article will help you to care for these: https://www.gardeningknowhow.com/ornamental/flowers/orchids/vanda-orchid-care.htm