Homemade cat food
Sardine Bone Calcium Crumble
The bones in a tin of sardines are soft enough to crush between finger and thumb, which makes them one of the few genuinely safe ways to get calcium into a homemade cat diet — the mineral that home-cooked feeding most reliably gets wrong.
- Difficulty
- Easy
- Time
- 25 min
- Makes
- About 12 servings
🧺 Ingredients
- 2 tins of sardines in spring water, no salt added, bones included
- 1 tbsp plain oats
- 1 tsp dried parsley (optional)
👩🍳 Method
- Drain the sardines but keep a spoonful of the water.
- Check that the tin says spring water and not brine or oil — salted fish is the single most common mistake in this recipe and the reason to read the label rather than trust the picture.
- Mash the fish thoroughly with a fork, bones and all. The bones should disappear into the mash with light pressure; if any feel sharp, keep going.
- Spread the mash thinly on a lined baking tray.
- Bake at 150C for 15 minutes, until dry to the touch but not browned.
- Cool, then crumble to a coarse powder with the oats and parsley in a processor or by hand.
- Sprinkle a half teaspoon over an ordinary meal rather than serving it alone.
Nutrition: Soft fish bone provides calcium in its natural ratio with phosphorus, which is the form cats absorb best and the balance that matters more than the raw quantity. The sardine flesh brings omega-3 fatty acids alongside it, so the crumble does something for coat and joints as well as skeleton.
📝 Notes
Keeps two weeks in an airtight jar in the fridge. This is a topper, not a meal — the point is to sprinkle it onto home-cooked food that is otherwise short of calcium. Anyone feeding a genuinely homemade diet long-term should have the whole recipe checked by a veterinary nutritionist, because calcium and phosphorus have to be balanced against each other rather than simply added. Cats on complete commercial food do not need this at all.
⚕️ Before you cook for your cat
- Homemade food must be balanced. Cats need taurine, and deficiency causes heart and eye disease.
- Treat recipes are supplements to a complete diet, not a replacement for it.
- Check any new ingredient against the toxic-foods list, and ask your vet before switching diets.