Pre-Approved posts

When I don't mention the name of my veterinarian, why is it I am not allowed to post what he charges? My posts concerning what my vet charges vanished overnight. Are we supposed to start a new thread when it comes to what our vet's charge? This is the only forum where my posts keep disappearing one after the other. I have read the Forum Rules and keep within the guidelines. Are there certain rules for the Pet Forum here I somehow missed?