A dog's life cycle begins at puppyhood and spans an average of 12 years, although some dogs live considerably longer. The female dog generally become sexually mature by age one and can begin reproducing after that time if not spayed.
Most dogs are pregnant for 63 days and can have as many as 15 puppies in one litter. Smaller breeds generally have three puppies or less, while larger dogs may give birth to more than a dozen pups. Puppies are always born with their eyes closed; their eyes will not open until they are around two weeks old. Puppies grow quickly after birth, and generally only suckle the mother for about six weeks, during which time they begin to develop permanent teeth. Most dogs have reached their full growth potential by age two.
Puppies are generally considered to be adults by age two. Female dogs go into estrus (heat) twice each year, usually for about 10 days. The female emits an odor that is attractive to the male and that lets him know she's ready to conceive.
The world record for the oldest dogs stands at 29 years and 5 months. It belongs to an Australian cattle dog named Bluey. Bluey was born in 1910 and died in 1939.Learn More
According to Cesar Millan, dog-bite prevention begins at home with your own dog by being a responsible dog owner. There are several things a dog owner can do to make sure his dog does not bite other people or dogs.Full Answer >
When a female dog is in heat, an intact and sexually mature male dog in the area can act anxious and aggressive towards other male dogs. He loses interest in anything except mating. A neutered male dog usually acts normally around a female dog in heat.Full Answer >
Male bull sharks live an average of 12 years in the wild, and females live an average of 16 years. They reach up to 11.5 feet and weigh between 200 to 500 pounds. Bull sharks are capable of breeding in both freshwater and marine habitats. They are named for their short, blunt snouts and their tendency to headbutt prey.Full Answer >
Breeds that make good hunting dogs include those in the "sporting" group of the American Kennel Club, such as numerous breeds of Spaniels, Retrievers and Pointers. The Golden Retriever is a popular family dog that is a good hunting dog. Its intelligence and desire to please its master also makes it ideal for work as a guide or in search and rescue.Full Answer >