First, no one can see what a dog sees, thus it's hard to know where this belief comes from.
Dogs just don’t see as vivid colors as we do,” says doglab.com consultant Sara Ochoa, DVM. The main colors dogs see are yellow and blue.
Two of the three light receptor types needed to detect color are in the canine retina. Sick Dogs Eat GrassDogs do eat grass when nauseated.
Ochoa said grass makes them vomit, but other dogs eat it for other reasons. Sick Dogs Eat Grass—Debunked
If you find your dog eating grass, don't worry—they may be intrigued!A Friendly Dog Has a Wagging Tail
The Puppy Academy says it can indicate a dog is friendly, enthusiastic, and ready to play, but not always.
If you're not convinced a dog is friendly, check for other signals like relaxed eyes and ears, according to the Puppy Academy.His often-cited “fact” is false.