Duck hens Voice changing?

[TheMallardDuck]

Hi I have 2 hens, one is a year old now, the other is nearly a year old by 1 month. We have noticed that both of their voices has changed. The older one’s voice changed first and now the second one’s voice has changed now. I’m not sure if it’s got higher or lower yet I’ll give an update for that. Is this normal when they get around a year old? They do quack a lot more often and sometimes just really abruptly out of nowhere.

 

[TheMallardDuck]

Update:
Their voices have gotten more high pitched.

 

[Miss Lydia]

Can you put a video here you’ll have to put it on Viemo or you tube then copy an paste here.