Information from Bunnyhugga readers on calcium problems in their own rabbits, the symptoms, causes and treatment...
Quigley Wiggley Super Bunny, 7.5 yo, gray/white dutch bunny, about 4 lbs (1.8 kg), general health is good, he was turned over to the local Animal Shelter when he was 1 yo.
Quigley was drinking tons of water. He was my 4th bun and he drank way more than any other one. He constantly drank water. He peed a lot. Ended up that it was a combo of too much calcium and, apparently, he's just naturally thirsty.
Vet tested him to find out about calcium. She had us change feed to Oxbow Basic T pellets (based on timothy hay instead of alfalfa). That helped a bit.
Changed the pellets. And, in case of an natural disaster/emergency and I can't get home for 3 days, I always had 2 of the big Lixit bottles of water. Since, Quigley, I have 3 bottles. (I only have 2 bunnies at a time.)