Dogs eat grass to throw up
The origin: This myth originates from people observing their dogs eating grass and then vomiting.
The truth: There actually appear to be two distinct types of grass-eating behavior in domestic dogs. Some dogs graze casually, taking only a few nibbles of grass at a time, while others chow down on grass vigorously and with a purpose. Dogs who wolf down their grass tend to vomit it (and other stomach contents) within a matter of minutes. Dogs that graze slowly usually do not throw up. So, eating grass does not necessarily mean that a dog has an upset stomach.
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