Sheep, goats and pigs were the first animals to be domesticated, about 9000 years ago. The earliest archaeological evidence of domestic pigs was found in eastern Turkey. Archaeology indicates that cattle were first domesticated in the Fertile Crescent about 8000 years ago. Evidence of domestic cattle was also found in Pakistan, from about 7000 years […]
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Just as in humans, the heart of a pet is muscle consisting of four chambers. Valves separate the chambers preventing blood from flowing back. Blood is sent to the lungs where it receives more oxygen and then travels throughout the body. If dogs develop heart disease, it is usually in the valves, occasionally in the […]
