Calcium Supplement dosage for my Female Mallard

[Miss Lydia]

Hello I have a 6 almost 7 month old female mallard this she is about ready to lay her first egg. Of course I want to make sure she is getting adequate amounts of calcium I however don’t want to incorporate oyster shells for any on the side dishes because I have a drake and he basically will eat everything. So I wanted to give her supplement orally with this reptile powder mixed with water in a needless oral syringe but I’m not sure how much female ducks need she is 2lbs. I appreciate the help with the dosage :]

My drakes always have to try anything I put down but they lose interest pretty quick. Eating a small amount of oyster shell will not hurt him.

 

[Jenbirdee]

by the way your ducks are beautiful!
. i’m still trying to wrap my brain around this math- looking at your reptile product label., it says there are between 380000 and 430000 mg calcium per kg.

1000 mg is 1 gram
430000 mg is 430 grams

1 kg is 1000 g

430 per 1000g

i think there is

4.3 calcium per 10 g of your powder

BUT I’M NOT SURE
someone please help with the math

 

[Jenbirdee]

I found this helpful re vitamin d deficiency and dosage
https://duckdvm.com/condition/vitamin-d-deficiency