Dogs are one of the most popular domestic animals on the planet. They have been with humans for over 12,000 years. Their ancestors were wild wolves. The earliest dogs were hunters and herders. Some breeds were prized for their fighting skills or guarding capabilities.
The dog is an intelligent animal. It can detect cancer and epileptic seizures. As a pet, they can provide companionship and emotional support to people. But some dogs are also known for being aggressive toward family members, other pets, and children.
They are also prone to various diseases. One of the most common zoonotic infections is Salmonella. This infection can cause a number of serious conditions, including gastroenteritis and osteomyelitis.
A variety of different types of genetic disorders exist, including cleft palate and elbow dysplasia. If your dog is unspayed, she may develop pyometra. Another problem is bloat, which can result in deep-chested dogs.
There are six basic nutrients that are required by the body: proteins, fats, vitamins, minerals, carbohydrates, and water. Depending on the species, some breeds require more or less of these nutrients.
The gastrointestinal tract of the dog includes the stomach, the large intestine, and the small intestine. These organs allow the dog to digest food into useful nutrients. Water and other waste are eliminated through the feces.
Dogs have an internal thermostat that maintains their body temperature. While panting helps them to lose heat, it also draws hot, moisture-filled air into the lungs.