I think it makes sense to do because it is a fairly specialized area. I recall one time asking ex-MC if there were any types of clients he wouldn't see. And he said he wouldn't see a client with an eating disorder (hope that term doesn't bother you) because he doesn't have the specialized training for that. And current T had suggested I see one of his colleagues for a session or two to discuss alcohol issues because she's an expert in addiction. So I think T's understand that they can't specialize in everything and would want their clients to get help from someone else if there's an area in which they lacks skills/experience. Because of your good relationship with your T, I imagine he'd be all for it. I'd think the only concern would be if you were to talk about other issues with that T, because then there could be "duplication of services" and could lead to confusion (if they were giving you different messages). I mean, I'm sure you'll have to talk about factors that contribute to the eating, so you might have to talk about, say, childhood. But as long as it's all addressing the main issue, I imagine both T's would be OK with it.