To ask for help in improving my 5 year olds terrible diet?

[Poppybella2015]

My 5 year old has never eaten much. Since she started school she has been suffering from acid reflux. We are not sure if it is the stress of starting school, her diet or something else. She has been prescribed Ranatidine by her doctor. The only thing I have control over is her diet. I really want to improve it but she is so fussy. Please can anyone make any suggestions, I will post what she eats below (please do not flame me, I have never posted in aibu before but I really need some simple changes I can make for my daughters health)

Breakfast: wholemeal bread with either, Nutella, baked beans, boiled egg or spaghetti hoops, glass of blackcurrant high juice

Lunch: either a packed lunch of cheese sandwich, crisps, biscuit bar and a carton of pure apple juice or school dinners (along the lines of fish fingers, chips and a cake - they are not very healthy)

After school: milk mixed with chocolate nesquick powder, 2 biscuits

Dinner: home cooked meal like cottage pie, yogurt tube for pudding, blackcurrant high juice

I'm not sure if it can go in milk I'll have a look

Pear juice is much more gentle on the stomach
We give this to dS3 who has a very delicate gut
I second the use of probiotics too-Bio Kult and Optibac are both very good

I can sympathise, my son's fussy. Instead of Nesquick what about cocoa/sugar and a small amount of milk mixed into a paste then add rest of milk, hot or cold, you can control the sugar a bit better and with no additives.
Del monte do pure juice lollies, no additives.
I know it might sound an impossible thing but my son made chicken/veg stir fry at school and actually ate it, we make it at home now. Do you think your children would find it interesting to help you make something like that.
There's a couple of brands of crisps with no additives or salt added.
spicy chicken and tacos with cheese.
What about kwis, raisins, dried apricots.

www.bimuno.com/buy-now/product/bimuno-powder-triple-pack

Sorry, just seen you already give a probiotic. You could add in a prebiotic like the above also

www.ocado.com/webshop/product/Daylesford-Organic-Pear-Juice/66895011

This juice is lovely, 80% pear, 20% apple