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When choosing food for a Leonberger, there are many factors to consider: Their age, lifestyle, activity level, physical condition, and health including potential sickness or sensitivities. Food provides energy to cover a dog’s vital functions, and a complete nutritional formula should contain an adjusted balance of nutrients to avoid any deficiency or excess in their diet, both of which could have adverse effects on the dog. As giant-sized breed dogs have a higher risk of a condition called gastric dilatation volvulus (GDV), where the stomach becomes overstretched and rotated because of excess gas (usually caused by overfeeding during a meal), it’s recommended to split the daily allowance into three meals for puppies and try to keep this routine into their adult years.

Clean and fresh water should be available at all times to support good urinary regularity. In hot weather and especially when out exercising, bring water along for your dog’s frequent water breaks. Energy intake may also have to be adapted to the climatic conditions. A dog that lives outdoors in winter will have increased energy requirements.

The following recommendations are for healthy animals. If your dog has health problems, please consult your veterinarian who will prescribe an exclusively veterinary diet.

A Leonberger puppy’s requirements, in terms of energy, protein, minerals, and vitamins, are greater than those of an adult dog. They need energy and nutrients to maintain their body, but also to grow and build it. During their growth, a Leonberger puppy’s immune system develops gradually. A complex of antioxidants – including vitamin E – can help support their natural defences during this time of big changes, discoveries, and new encounters. Their digestive functions are different from an adult Leonberger’s, too: Their digestive system is not mature yet so it is important to provide highly-digestible proteins that will be effectively used for the building of bones, tissues, and organs. Prebiotics, such as fructo-oligosaccharides, can support digestive health by helping balance the intestinal flora, resulting in good stool.

Giant-sized puppies, whose growth period is long and intense, are especially susceptible to skeletal and joint problems, including limb defects, bone deformities, and joint lesions.

The first part of growth (up to 8 months) is mainly concerned with bone development, although the muscles also start to grow. This means that a puppy that eats too much (takes in too much energy) will put on too much weight and grow too quickly. A food with an adjusted calorie content to support a high growth rate while at the same time avoiding excess weight gain will help minimise these risks. A balance of energy and minerals (calcium and phosphorous) during this first phase of growth will contribute to bone mineralisation in order to support bone consolidation and the development of healthy joints. Although the calcium content in the food needs to be increased, giant-sized breed puppies are more sensitive to excessive calcium intake. It’s important to understand that adding any ingredients to a complete food formulated for the growth phase is at best unnecessary and at worst dangerous for the animal, unless prescribed by a veterinarian.

As with many giant-sized breed dogs, Leonbergers are prone to digestive sensitivity, and their body weight can create stress on their joints throughout their lifetime. Leonbergers’ nutritional needs then should include high-quality protein and a balanced supply of dietary fibre to help promote optimal digestibility, as well as glucosamine, chondroitine, and antioxidants to help support the health of their bones and joints. A formula enriched with omega-3 fatty acids, such as EPA and DHA, will help maintain healthy skin. An adapted taurine content is also important to support healthy heart function.

It is important to avoid feeding Leonbergers human foods or fatty snacks. Instead, reward them with kibble taken from their daily meal allowance, and strictly follow the feeding guidelines written on the package.