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For those of you who care and dog lovers had not asked, why not bite the dog bones? Even include a toy bone, the bone must be shaped so long as directly bitten by the doggy.
According to the expert team led by Dr. Joao Munoz-Doran of the National University of Colombia, the habit of eating dog meat began about eight million years ago. At that time, a group of ancient dogs to search for larger prey.
The habit of making derivative ancient dogs, like wolves and modern dogs, a hiperkarnivora or 70 percent of the animals that eat meat.
This conclusion was obtained after Munoz-Doran team up 'pedigree' dogs that describe the relationships among more than 300 species of dogs. "We found the same evolutionary history among a number of types of dogs," explains Dr. Munoz-Doran.
"Eight million years ago a lot of open habitat in Asia, Europe, and North America. Competition is getting very tight and prey of these conditions make ancient dogs must be grouped when looking for and stalking prey, "he explained.
He explained, from the habit of hunting in packs, the new emerging breed of dog with a different head shape, with a more powerful jaws, and larger canine size. They are able to survive the natural selection and continue this form into the next generation of dogs.
The researchers say that is why pet dogs, though no longer have to hunt for prey in the open, still 'continue' habit of eating meat or freezing.
"They have the tools to perform these habits and they want to use it," said Dr. Munoz-Doran.
1. Bald Eagle (Haliaeetus leucocephalus)
Birds of prey who became a symbol of the United States is quite loyal. They would seek a new partner after partner's death.
2. Wolf (Canis lupus)
A wolf can have several pairs in his life, but only have one pair at a time. Wolf mate with a male only, but will look for a replacement if the spouse dies, expelled from the group, ill or infertile.
3. Anglerfish (Lophiiformes)
Monogamy in marine fish is very extreme. When mating the male bites the female until they are mixed with blood, and the males run out of sperm.
4. Penguin (Sphenisciformes)
After the film "March of the Penguins" in 2005, many people assessing penguin is an ideal example of monogamy. Though they are not very loyal-loyal. Penguins monogamous only in one mating season. After that they exchange-rate pairs.
5. Vulture Hitam (Coragyps atratus)
This is an example of monogamy conservative. If you get caught "cheating", which is spread a vulture on the American continent will be under attack from her partner, also from the friends group.
6. Antelop Afrika (Madoqua kirkii)
Unlike most monogamous creatures, male antelopes do not help females in parenting.
7. Red Back Salamander (Plethodon cinereus)
This type of creature that's easy to see red. Males will immediately attack the females if they see their partner having an affair with another male.
8. Shark Muzzle Shovels (Sphyrna tiburo)
Female sharks of this species mate with several males at once. However, the resulting child comes from a male.
9. Spider Argiope aurantia
Like other spiders, males die after eating intercourse as in females. But Argiope aurantia males leave the "keepsake" before dying of a barrier in the genital tract, so that females can not marry again.
10. Meadow Mice (Microtus ochrogaster)
Males of this type mice will spend a lifetime with the first female having intercourse with her. Never flirt with other females, so faithful, males are even attacking the other females who dare to approach.
