thanks everyone for your advice - sorry I have not replied sooner - I've had computer problems.
As it turns out from all your advice I have accidently been doing what you have advised but not regularly enough - I have only been vomiting her every other day (I can't stand the smell besides it...
I have a 5 month old HiLine - she has had a swollen crop on one side for about 2 months. Bridget seems healthy, has shiny feathers and seems to be eating drinking and pooping ok. She is smaller in size and her comb has not fully developed compared to our other chicken and has not started...