One of my 6 weekers has runny poo. The problem is I don't know which one it is. I have watched them and they all have normal poops also...... I put 1 capful of ACV (per 1 quart water) in their water today. I hope this will help. Can someone be more specific as to the ACV per water formula? One capful seems so little! The nurse in me wants to know how many cc's...... FOUND IT!: ratio of about ¼ tsp per 4 oz water is best.