I have 2 Flemish giant rabbits that are 6 month old brothers. They are out all day and have access to food and water. I just got them a couple days ago and we've been staying at my parents house til tomorrow because a couple things needed to be fixed at my house so at night they sleep in my parents dogs kennel. Idk if any of this makes a difference or not but tonight I was laying down next to where they sleep and heard a weird noise. I know rabbits can't throw up but that's honestly what it sounded like happened and when I looked in there was alot of a milky yellow colored liquid. I started looking it up and from what I've gathered it looks like pee but there was alot of it. Is this normal?