Lungs are cut into small pieces for training. It is convenient to take for a walk, for classes at home, training puppies with a dog trainer or to create intellectual games. Lungs contains a large amount of protein, which is necessary for the dog's body to develop muscle tissue. Suitable for all breeds of dogs and puppies aged 2.5 months. There are two sizes: mini - for small breeds up to 5 kg. Maxi - for medium and large breeds from 5 kg.