Is my 11 year old sister depressed or just moody?

it sounds like she might have an eating disorder

counting calories to the point where youre in an unhealthy calorie deficit can lead to being moody or mean all the time and even losing friends because ur so focused on the calories

i have ednos so i know how that feels and have dealth with that so ill try to give some advice for you

try not to mention calories to her at all or doing things that might trigger her like talking about weight loss or body checks

dont shame her about the types of food she eats

if she asks about the cals dont lie to her because that could possibly lead her to thinking that you want her to be fat, or say the calories dont matter and try to be incouraging of her eating food without thinking of the calories

like mentioning the health facts of that food and the healthy things it can do to your body, how it helps your body function

dont force feed hertry to be there for her your sister is still very young and usually it wont be as hard to recover from as people who have suffered with ed's from an older age or longer its definately not anything like being a typical moody teenagers 

Wait...you say she has lost interest in having friends...then who is she on the phone talking to for 12-14 hours?

I think this is neither moodiness or depression.

I think she has found someone to talk to who is toxic for her.  Someone has been talking to her about her weight and for an 11 year old to stop eating healthy food is dangerous as she grows.  And so I wonder who she is talking to and I wonder what this toxic individual is saying to influence her?

an 11 year old girl does not need a phone, it should be taken off her or she is only allowed to use it for maybe 2 hours a day. Where are your parents in this sorry tale. She needs discpline. SHe needs to play some type of sport. Maybe the whole family can all play a sport together.

I think shee a guilty conciuosis depressed get her help before its to late Dont have a Guilty concious when she takes her own life ive been through to many

just a typical moody teen

I don't know. But this magazine can help her. https://www.jw.org/en/library/magazines/awake-no1-...

Here's some information that may help.

Teen Depression—Why? What Can Help?https://www.jw.org/en/library/magazines/awake-no1-...

Helping Your Child Deal With Puberty

https://www.jw.org/en/library/magazines/awake-no2-...

You can't do anything.  This is something your parents have to deal with on their own.  Her change in eating habits and phone "addiction" are concerning, however.  Continue to monitor the situation and report your concerns as necessary.

depression doesn't exist, she is just a dumb little attention seeker.

She may have a love interest on her mind.