Hello two days ago I bought two new budgies to accompany my other two budgies. Before I got them, I was told they were homebred, and have left the nest (aka was weaned and has left the mother’s side. This was said in my mother language so some might misunderstand) One of the budgies was completely normal but the other one, was the runt of the clutch. It is the smallest budgie I’ve ever seen. The size of an Adult man’s thumb. It hadn’t known how to fly yet and there weren’t fully feathers on her butt yet. All she eats are seeds and veggies. I tried feeding her handfeeding formula but she doesnt like it. I’m worried that she might be malnutritioned or something bad might happen to her since she’s so small, doesn’t know how to fly yet and doesn’t fully have feathers yet. What should I do?