Cloudy bunny urine is normal. Rabbits expel calcium via the urine, unlike most other mammals. When the cloudy pee dries, there’s a chalky residue. Here is some good Medirabbit info with pix, about how normal pee can look and how bladder sludge looks: http://www.medirabbit.com/EN/Uro_gen_diseases/generalities/Sludge.htm

Alfalfa has more calcium than grass hay. But all rabbits pee cloudy from time to time.

Milky pee means too much calcium, probably from the alfalfa. What about supplementing his normal diet with Critical Care in the morning and at night? You don’t have to force feed it, just mix it up in a dish and leave it for him to eat throughout the day

If there’s chalky pee every day, and he’s an adult rabbit, I’d try with what A&B suggests, critical care. Not all buns will eat it from a plate though, but many buns will if you mix it with something the bunny likes. Canned plain pumpkin, baby fruit smoothie, unsweetened apple sauce etc. The Critical Care apple-banana is much more popular with my bun than the “original” flavor is.

The apple-banana flavor is the way to go. Bombur loves it, especially if you mix in a little bit of the banana baby food. Little man goes mental for it. We’ve had some GI episodes in the past, so Bombur’s a pro with CC.