Researchers have found that dogs are capable of understanding up to 250 words and gestures, can count up to five and can perform simple mathematical calculations.
Using tests originally designed to demonstrate the development of language, pre-language and basic arithmetic in human children, the researchers were able to show that the average dog is far more intelligent than they are given credit for.
"The average dog is about as bright linguistically as a human two-year-old," said Professor Stanley Coren, a leading expert on canine intelligence at the University of British Columbia in Vancouver who has carried out the work.
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