It's not uncommon for an anorexic to swap one obsession for another. The danger is that if they go off the rails, they can fall back into the anorexia pit of despair. Because the psychological stuff has not been addressed and technically they aren't cured.
I was so wary (probably still am) of not ever letting myself get obsessed about anything or addicted to anything for that very reason.
Always wanted to be 1000% sure I was 1000% over it.
She's seriously not natty though, is she???!!!!!