The Puppy and the Dog They have been man’s companion through the ages and adapted to their owners, but they have their own behavioural and nutritional demands. Knowing and respectingthem will guarantee their health and well-being.

The cat’s feline nature is always a matter of fascination.He adapts with apparent ease to daily life, and yet he has behavioural and nutritional requirements of his own. Knowing them and respecting them will guarantee his well-being and his health.

Because of its composition, a Royal Canin Health Nutrition food provides all essential nutrients measured out with utmost precision in order to contribute every day and on a long-term basis to the well-being and health of every animal, according to his age, his size, his physiological condition and his breed.

Innovation for the sake of dogs and cats’ health. For over 40 years, Royal Canin has worked with breeder partners and veterinary nutritionists to go ever further into innovation and precision to enable us to formulate nutritional solutions which perfectly meet dogs and cats’ real needs.


Vitamin D

In large-breed puppies, an excess of vitamin D is more common than a deficiency. Excessive intake causes severe ossification problems (osteochondritis).

Vitamin D deficiency causes:

  • rickets (rare in dogs and cats);
  • osteomalacia (joint and muscle pains, bone fractures).

A little background information

The rickets-fighting power of fish liver oil was discovered in 1782 and vitamin D was isolated in 1932. This liposoluble vitamin is provided in the diet. It is naturally synthesised by humans and herbivores by the conversion of skin sterols under the action of solar rays. To be active in the body it must be modified, first in the liver, then in the kidney.

Its role in the body

Vitamin D plays an essential role in the regulation of calcium and phosphorus metabolisms :

  • increase in the intestinal absorption of calcium and phosphorus;
  • optimisation of calcium bonding (or unbonding) by the bone;
  • reduction in the loss of calcium and phosphorus in the urine.

Natural sources

Meat and vegetables are almost completely lacking in vitamin D, which is naturally found in fish liver oil, oil fish (sardines, tuna), egg yoke, milk and dairy products.