‘Fat’ jibe misery of girl age 10

It sounds like you are a great parent and she’s a healthy girl. So you need to find out why she is picked on. See her teachers, explain the impact it’s having and ask if they think she’s overweight (just in case you cannot see it). Also ask if the school can address body differences and the importance of kindness. Talk to your girl about her happiness, build her confidence by praising her for what she is good at. If she’s not fat, but still thinks she is, you need to nip it in the bud so it doesn’t turn into an eating disorder. Visit your GP and start the discussion now.