S.H.
A baby or child...if they do not want to eat something they won't... even if you starve them. You will be surprised.
No, your child is not unusual. THIS is a common thing with kids... it's all about ages & stages and phases. Kids go in and out of food likes/dislikes ALL THE TIME.
Main thing is she is fed, and nourished, even if that means she is eating the same ol'.
A child will have MANY MANY food phases. At this young age...their taste-buds are STILL developing... and changing. Thus, the resulting food aversions or like and dislikes. It's normal behavioral based, and biological based and developmental based.
Don't punish for it... as you said, using food as a tool to punish her and give her hang ups. Not good at all.
And no, she is not just being difficult. Just see what makes her tic....and just feed her. No big deal.
Believe me, this is just one small "phase" of many.... the ages from 1-2 and then from 2-3 years of age is particularly a difficult transition.
I recommend the book "Your 1 Year Old" which you can get from www.amazon.com It will explain each "age stage" and what to expect and how a Parent can HELP a child and understand them. In context of their age and stages. Not ours.
You could try and feed her smoothies... or calorie dense and nutrition dense foods... *Or, give her "Pediasure" which is a full-vitamin packed "meal" drink for kids. It also has needed protein in it. I would try and give her this...it is used for children that are under-weight or has other food issues. Because it is nutrient packed, for kids... it is good and helpful. I even give that to my son sometimes, because he is such a picky eater. *There is also something called "Carnation Instant Breakfast" drinks, which are the same type of "meal" drinks and it's for kids as well. Full or vitamins and protein.
Since your Pediatrician said she needs to gain weight... or he is concerned about her percentiles... the what did the Doctor suggest?
Your child is normal. Just let her eat what she "will" eat. She will not starve or be malnourished. Even teenagers and adults have changing food likes and dislikes.... so a mere 1 year old should not be exempt. UNLESS... you think she has a food sensitivity or other type of problem...
All the best,
Susan