Magnesium
An essential mineral. It sits alongside calcium and phosphorus in bone and is needed for normal nerve and muscle function.
| Adult dog | 0.07–0.08 g per 100 g dry matter0.18–0.20 g per 1,000 kcal, depending on activity |
|---|---|
| Adult cat | 0.04–0.05 g per 100 g dry matter0.10–0.13 g per 1,000 kcal |
| Puppies | 0.04 g per 100 g dry matter |
| Kittens | 0.05 g per 100 g dry matter |
For cats, FEDIAF sets the adult figure at double the level shown to maintain adult cats, to allow for interactions with other dietary factors. Magnesium in cats is a balance rather than a more‑is‑better mineral, which is why any addition is the clinician's decision.



