My female black swedish duck seems to have a really saggy bottom. The other night she laid a marble sized "egg" in the yard at night. No shell. She pooped it out I guess. My husband saw it. It was covered in poo. I'm not sure what's going on. I looked it up and it just had appeared like what normal laying ducks get. But it's getting bigger. Her eggs were weird shaped awhile ago and I noticed she hasn't been laying very often unless she is hiding her eggs. She is acting like her normal self. Should I bring her in for a nice warm bath to see if she is egg bound or is there something else I should be looking for?