I went to let the chickens out this morning and Felicia was acting very strange and lethargic. I checked her vent and there was egg yolk oozing out and a string of soft egg shell. I gently pulled some of it out but I fear there's still some left inside. I read that I should bathe her and then flush with water and vinegar? Is that the right way to go about it? Unfortunately the vet isn't open until Monday so I want to help her asap. Can anyone help please!?