Common Causes of Calcium in Rabbit Urine
📝 Summary
Rabbit calciuria is common in youth and usually brief, but it should still be corrected early to avoid long-term harm. Here are the main causes and how to fix them.
1 Why Do Rabbits Get Calciuria?
1. Food too high in calcium. Pellets rich in calcium, such as large amounts of alfalfa, make the body excrete the excess through urine. Some pellet brands add calcium for nutritional balance, but with already calcium-rich hay this easily pushes adult rabbits into calciuria.
2. Low water intake. Rabbits need enough water; when intake is low, urine becomes concentrated and the amount of calcium excreted rises.
3. Lack of exercise. Rabbits need regular activity. Without it, calcium can deposit in the body and, in serious cases, block the urethra; with luck the body passes it gradually as calciuria. Exercise keeps metabolism and calcium levels normal, so let rabbits out of the cage to move regularly.
2 How to Fix It
The most effective fix is switching the pellets, since most calciuria comes from too much calcium the body cannot absorb. Move to low-calcium food, and swap mineral chew blocks for wood or apple twigs.
About alfalfa: it is rich in calcium and nutrients and is meant for kits under 6 months to support fast growth. After 6 months, phase it out and switch to timothy hay; otherwise over-nutrition causes calciuria or obesity.
Note: calciuria in kits is usually brief and harmless, but in adults it can block the urethra and form stones, so never ignore it in grown rabbits.
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