Cats and dogs can infect COVID-19, but there is no evidence that humans infected with COVID-19 can infect cats, so owners need not worry too much. If the owner is diagnosed as COVID-19 positive and quarantined, these cats should also be tested together. If you confirm that the cats and dogs are not infected, you can leave them at home or ask community personnel to look after them.

Dog's genetic code:

The evolution of dogs is related to starch digestion: by comparing the whole genomes of dogs and wolves, researchers at Uppsala University revealed many changes in the evolution of wild dogs into human best friends. Unsurprisingly, many of these different areas affect the brain, which may explain the temperament difference between wolves and dogs.

In addition, this comparative study also pointed out several areas related to digestion, including genes that help break down starch. Researchers say that dogs may domesticate themselves by looking for humans and eating human leftovers.

According to the study of Israeli fossils and genetics, the domestication period of dogs was about 6.5438+0 million years ago, which coincided with the agricultural revolution, and human beings changed from nomadic hunting to farming and settled life. Some scientists believe that wolves are attracted to the garbage dumps of these early settlements and feed on the leftovers of vegetables and cereal plants.