Hey CocoaPuff. I think for most rabbits, there’s a short latency period between when they drink water/eat watery vegetables and when they go pee. You may just need to stalk Puff after he drinks some water, and prepared with a small container (any that you’re willing to sacrifice for the job, such as a small cup; a measuring cup may work since they’re small) to put by his bottom. Wick usually pushes his bottom out when he urinates, so there’s a nice angle from the exit source to the ground where I can imagine myself holding a cup in front of without scooping up his bottom. Rabbits will usually investigate a spot, turn around, and back-up when they go to pee (unless it’s an “I hate you” pee, in which case they just do it).
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.