Study Says Dogs Can Be Jealous

Dogs are known as our best friends and apparently, they don't want you to forget it!.

A new study says canines can feel jealousy.

Researchers at the University Of California San Diego had owners play with an animatronic toy dog, children's book and plastic jack-o'-lantern -- all while ignoring their pets.

The dogs did not like it.

Some of them got aggressive, pushing their owners while they played with the fake dog.

And most of the pets tried to sniff the bottom of the toy dog, suggesting they thought it was real.

Researchers think jealousy may have evolved in dogs because they've been domesticated for so long.

The study is published in Plos One, an online scientific journal.

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