Most of my birds are on sand, but I still provide grit for them. Do you have her quarantined? You should separate her from all other birds, in case she has something that they could get.
You could try gently massaging her crop. You might want to research sour crop. But, I am pretty sure you can smell sour crop. I haven't ever had that issue, but have heard it is not a mistakable smell.
You might try and give her some Tylan50 for 3 days. I don't see what it is going to hurt at this point. Get some probiotics in paste form and scrap some under her beak.
Birds hide their illness unless it's almost too late sometimes. She doesn't seem to have any symptoms other than being listless.
You could try gently massaging her crop. You might want to research sour crop. But, I am pretty sure you can smell sour crop. I haven't ever had that issue, but have heard it is not a mistakable smell.
You might try and give her some Tylan50 for 3 days. I don't see what it is going to hurt at this point. Get some probiotics in paste form and scrap some under her beak.
Birds hide their illness unless it's almost too late sometimes. She doesn't seem to have any symptoms other than being listless.