Meat can stay off the plate
Meat is part of dinner only when their diet includes it. Chicken stays off for vegetarian plates and for plates that include egg but not meat.

Nobody needs meat at every meal
Beans, lentil, egg, or dairy, when those fit, can be the food that sits with the rice. Nobody needs meat at every meal.
A full plate without chicken is a normal dinner in a lot of homes.
Which diet holds chicken
Includes meat is the one that can hold chicken. Vegetarian, and the diet that includes egg but not meat, keep chicken off.
The app follows that rule. Do not add chicken on a plate the diet has already closed.
Growing does not require a proof
You do not add meat to prove a child is growing. Worry about growth belongs with your child’s doctor.
Serve the foods the diet already includes, including one they already eat.
A sentence you can say
“No meat on this plate. The beans are here.”