Duck with body trembles

[Ericzahel]

I have a 3 and a half year old kakhi campbell who has random body trembles what could this be ? Her and her sister both do that when preparing to lay a egg and a little after which they always have done but im wondering why is she doing is thru the day and night soemtimes now ? Otherwise she seems ok , eating, drinking , preening, gets the zoomies mostly everyday and lays a egg almost every day , she usually only skips a day about 3 to 4 days a month .could it be her trying to adjust her body temperature ? Vitamin deficiency?they are on kalambach all natural duck n goose feed and have free choice pulverized oyster shells available 24/7 in a seprate dish and get daily treats of peas , corn and dandelion leaves , i just worry about my girls , I love my ducks so much and they are my first 2 ducks hatched them in a homemade incubator, they are my heart n soul id die without them !!

 

[CherishedFowlGuardian]

Idk
What’s the temperature like?

 

[Miss Lydia]

I see you also asked this question back in July. If you could get a video of your ducks doing this it might help us figure it out. You will have to upload onto a platform like you tube then copy and paste it here.
I was looking up duck with body trembles and came across your thread from July https://www.backyardchickens.com/threads/trembly-duck.1671095/

 

[Goosebaby]

Does she start doing this in your presence or in the presence of another bird? It could be the warning quivers, they do this to show dominance or to warn others away.