I am not sure about the vinegar to help poop, From what I have read here some 100% pumpkin in with her food will help keep her regular both ways.
Sounds like Coco might have been mad at you for putting her in the kennel and now your wife is her new best friend This happens to to me when I put Ike in kennel or correct is piranha behavior. My wife or daughter will be his buddy instead of me
Others will chime in but if she is eating, and drinking and poop is normal, I wouldn't worry to much unless it changes or continues.
Those are my .02's