Dogs which pull on their leash while walking with you is a common problem seen among many different breeds. This problem can be seen in puppies as well as adult dogs. Dogs which pull on their leash while you walk this is more than just aggravating. If the leash breaks, the dog could run and put itself or others in danger. You should want to walk your dog, not have it walking you.
There are a number of different reasons why your dog will pull on the leash. Some dogs are so happy to go for a walk that they are out of control, and are anxious to move about. Other dogs see themselves as being the leader, and will move forward with force because they feel that they are moving ahead of the pack. If you r dog is very happy about going out, it may help to give them some time to calm down. You can stand still with the dog for a few minutes until they become more relaxed.
If the dog feels that it is the leader, this is a sign that you should begin training him. The owner has to show the dog that they are the leader. When you don't have this understanding with your dog, it will be impossible to train them properly. If your dog shows signs of control, it is best to go back to simple obedience training. If you don't have the time to train the dog yourself, it may be best to send them to a dog training school.
The instructor can train you as well as your dog, and they can show you how to keep the dog from trying to be the leader. Skilled instructors should always work with both you and your dog. The first step in getting the dog not to pull on the leash is to get it to accept the collar. If the dog is moving around a lot while you are trying to put on the collar, this is a sign that your dog will pull against the leash. Start by commanding your dog to sit or stay while you put on the collar. If the dog gets up after you've put on the collar, make him sit back down quickly.
You should only walk the dog after it sits down calmly and allows you to put on the collar and leash. Once the collar is on, don't allow the dog to jump up and rush ahead towards the door. Gently pull back on the leash. Make him sit back down again, and repeat the process until he gets the message.
2008年9月16日星期二
2008年9月4日星期四
Turtles Swallows

Sea turtles are large, air-breathing reptiles that inhabit tropical and subtropical seas throughout the world. Their shells consist of an upper part (carapace) and a lower section (plastron). Hard scales (or scutes) cover all but the leatherback, and the number and arrangement of these scutes can be used to determine the species.
turtles
turtles are reptiles of the Order Testudines , most of whose body is shielded by a special bony or cartilaginous shell developed from their ribs. The Order Testudines includes both extant (living) and extinct species. The earliest known turtles date from 215 million years ago, making turtles one of the oldest reptile groups and a more ancient group than lizards and snakes. About 300 species are alive today, and some are highly endangered.
Sea turtles come in many different sizes, shapes and colors. The olive ridley is usually less than 100 pounds, while the leatherback typically ranges from 650 to 1,300 pounds! The upper shell, or carapace, of each sea turtle species ranges in length, color, shape and arrangement of scales.
Sea turtles do not have teeth, but their jaws have modified “beaks” suited to their particular diet. They do not have visible ears but have eardrums covered by skin. They hear best at low frequencies, and their sense of smell is excellent. Their vision underwater is good, but they are nearsighted out of water. Their streamlined bodies and large flippers make them remarkably adapted to life at sea. However, sea turtles maintain close ties to land.
turtles cannot breathe in water, but they can hold their breath for various periods of time.
Females must come ashore to lay their eggs in the sand; therefore, all sea turtles begin their lives as tiny hatchlings on land. Research on marine turtles has uncovered many facts about these ancient creatures. Most of this research has been focused on nesting females and hatchlings emerging from the nest, largely because they are the easiest to find and study.
Thousands of sea turtles around the world have been tagged to help collect information about their growth rates, reproductive cycles and migration routes.
Like other reptiles, turtles are poikilothermic . Like other amniotes, they breathe air and do not lay eggs underwater, although many species live in or around water. The largest turtles are aquatic.After decades of studying sea turtles, much has been learned. However, many mysteries still remain.
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