I don't know if this has been raised yet, but has anyone thought that salmongate may have something to do with Nikki's anorexia?
I'll really don't know a lot about anoerxia, but what I think is that, being body conscious, and having low self-esteem, if an anorexia is feeling depressed, the last thing they want to do is eat, and make themselves 'fat' (in their own low self-image/definition of what constitutes 'acceptable' body-shape) and therefore feel even worse about themselves for being 'overweight'.
So it may be that Nikki just didn't have an appetitie, whether that was salmon, or for whatever is her favourite food.
Clearly she is still anorexic, and clearly she was depressed. I think the rest of them could have been a little more tolerant of her, even though she is a drama queen and immature.
It was certainly not worth the food fight Grace deliberately turned it into. (Remember, she audibly bitched to Sleazer while Nikki was sitting a few feet away.)
Crying over spilt milk. It always happens in shared households.
Roberto - "You want your food? Here's your f-cking food!"
Sandy - "For f-ck's sake, either order Chinese or order Indian! Does it f-cking matter?"
Science - "Where's my salad cream? And what's this in my mince!"
Chantelle - "We've run out of Kuorn!"
etc., etc., etc., All this in a world in which millions are dangerously malnourished, and thousands of people die daily of starvation.
Oh well, you can't get a lab rat to run through a maze without the promise/smell of cheese at the end of it. And Big Brother is nothing if not cheesy (like my jokes!)