Hmm well, you know when I have clients who are in relationships, I try to make it a team effort and it's usually the male who is the one resisting from the cultural conditioning of men+meat=manly... sigh... I don't know Mr Bird ;) But what I usually do is show the men who think they can't give up meat some really attractive healthy people on Instagram. It always works. You can try Biance Taylor and Jon Venus. Now, they are usually in bathing suits so I warn you but I find that showing these people sparks a fire in most people and so they agree to try. I can't say this for certain with him but just a suggestion =D