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When choosing food for a Shih Tzu, there are many factors to consider: their age, lifestyle, activity level, physiological condition, and health including potential 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.

A Shih Tzu puppy’s requirements, in terms of energy, protein, minerals and vitamins, are much greater than those of an adult dog. They need energy and nutrients to maintain their body, but also to grow and build it. Until they are 10 months old, a Shih Tzu 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 Shih Tzu’s, too: their digestive system is not mature yet so it’s important to provide highly digestible proteins that will be effectively used. Prebiotics, such as fructo-oligosaccharides, support digestive health by helping balance the intestinal flora, resulting in good stool quality.

Similarly, a puppy’s teeth – starting with the milk teeth, or first teeth, then the permanent teeth – are an important factor that needs to be taken into account when choosing the size, shape, and texture of kibble. The maintenance of skin health requires nutrients, such as omega-3 fatty acids (EPA-DHA), vitamin A, and borage oil. This intense growth phase also means high energy needs, so the food must have a high energy content (expressed in Kcal/100g of food), while concentrations of all other nutrients will also be higher than normal in a specially formulated growth food. It is recommended to split the daily allowance into three meals until they are six months old, then to switch to two meals per day.

Throughout their life, it is important to avoid feeding your Shih Tzu human foods or fatty snacks. Instead, reward them with kibble taken from their meal allowance, and strictly follow the feeding guidelines written on the package in order to prevent excessive weight gain.

The main nutritional goals for adult Shih Tzus are:

Preserving the health and beauty of the skin and coat with the enriched addition of essential fatty acids (especially EPA-DHA), essential amino acids, and B vitamins to support the
skin’s “barrier” function

Maintaining an ideal body weight by using highly digestible ingredients and keeping the fat content at a sensible level.

Small breed dogs are well known for being fussy eaters. Exclusive formula and flavourings, as well as a kibble size with a special texture, will stimulate their appetite. Small breed dogs are also prone to urinary stones; a diet that supports a healthy urinary system is recommended.

For Shih Tzus living mainly indoors, highly digestible proteins, an appropriate fibre content, and very high quality carbohydrate sources will help reduce faecal smell and volume. Because an indoor lifestyle often means less exercise, an adapted calorie content, which meets the reduced energy needs, and a diet that contains L-carnitine, which promotes fat metabolism, can help maintain an ideal weight. Apart from an indoor lifestyle, neutering is also a factor in overweight dogs.

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After 8 years old, Shih Tzus start facing the first signs of ageing. A formula enriched with antioxidants will help maintain their vitality and an adapted phosphorus content will support their renal system. Ageing is also accompanied by the modification of digestive capacities and particular nutritional requirements, so food for older Shih Tzus should have the following characteristics:

Higher vitamin C and E content. These nutrients have antioxidant properties, helping to protect the body’s cells against the harmful effects of the oxidative stress linked to ageing

High-quality protein. Contrary to a widely held misconception, lowering the protein content in food brings little benefit in limiting kidney failure. In addition, older dogs are less efficient at using dietary protein than younger dogs. Reducing the phosphorus content is a good way of slowing down the gradual deterioration of kidney function.

A higher proportion of the trace elements iron, zinc, and manganese to help maintain good condition of the skin and coat

A higher quantity of polyunsaturated fatty acids (omega-3 and omega-6) to maintain the quality of the coat. Dogs can normally produce these fatty acids, but ageing can affect this physiological process.

As they age, dogs increasingly suffer from teeth problems. To ensure they continue to eat in sufficient quantities, the size, shape, and texture of their kibble needs to be tailored to their jaw.