I treated my blue marans pullet for sour crop less than 2 weeks ago, today i noticed she has it again. I've put her back in a cage with acv in her water and some natural yogurt. I'm wondering as to why it has returned, did it not clear properly the 1st time or could it be she has an impact and thats why it has returned? After the 1st treatment i checked her crop and i could not feel an impact, but maybe i missed it. Any advice for me?