I have five 3 day old chicks form the local farm store. This morning I noticed one of the black sex links had a swollen crop. I changed the water to have ACV. Did 1 tbsp per gallon. I did decide to shave a tiny tiny piece of Vagisil suppository off and give it to her as well. She was acting fine, eating and drinking. Tonight both black sex link chicks have swollen crops and watching a third chick whose crop seemed bigger that the other 2 chicks with no problems. After reading an forum on a 3-4 weeks old chick with swolllen crop I decided to remove all shavings and they are on paper tonight. Not sure if they were eating the shavings or not. I did give the 2 black sex links tiny tiny slivers of Vagisil tonight, making that the second dose for the one chick. Poop looks great for all chicks, but one of the black sex links is moving her head with a neck jolting movement with the crop bothering her. Hoping for good signs in the morning. Any advice? They are so so young I fear I may lose them. I have had raised chick twice before and never had this with a chick. I did have a hen that I treated twice for sour crop successfully with Vagisil. Thanks!