my female duck is sitting on the ground flexing her back end muscles and expelling some white stuff. I don't know what's happening?
what is she doing?
Tell us more about her. Is she laying eggs yet? How old is she? Do you have other ducks? Male or female? Is she flapping her wings? Making noises? Pumping her tail up and down?
Can you upload some pictures or a video?
Do you know how to post videos on Youtube? When I want to post a video here, I post in on youtube and provide a link. Do you have a pond or pool available? It is almost like she is asking to mate? Do they mate at all yet? If you don't have a pool available, where they normally would mate, she could be trying on the ground. It doesn't sound like she has an egg stuck. Have all of her egg had a nice strong shell?
Agreed, looks like she could use some more calcium.
Also, when she lays on the ground and expels the white stuff, is she flat on the ground with her head and neck stretched straight out in front of her, back rigid, wings maybe slightly out, and tail up? If so, that is breeding position and she's trying to get the male to mate with her. I've noticed when my females do this they sometimes get "excited" and expel a little white stuff in anticipation of mating.
Or, she could be simply having some laying problems and the extra calcium will certainly help with that. Especially after seeing her latest egg with the soft shell.