Rabbits metabolize calcium different from other animals. In rabbits, calcium in their diet is absorbed whether they need it or not. The excess calcium is mainly secreted via the kidneys. While most animals excrete only 2% of their calcium intake through their kidneys ~ rabbits excrete 45-60% of the calcium they consume. If a rabbit eats a lot of calcium, much of it is excreted through the kidneys and will end up in the bladder.
It is, therefore, important to know the calcium content of the greens we feed our companion rabbits ~ so that a greater proportion of lower calcium foods is fed to help flush out the excess calcium.
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