In this video clip Mom is pulling green shoots off a tall grass type plant and eating them. I watched Mom continuously for ten minutes after she ate that particular grass and she did not regurgitate. However, grass eating by coyotes is also known to be very often followed by the coyote soon regurgitating the grass and much else. In fact, when we see a coyote or our domestic dogs eat grass, we can be almost certain that they will soon vomit. Intrigued, I looked for a study on coyote diet. In Chicago, grass species accounted for from five to ten percent of food items found in coyote scat.
Some amount of the grass species in coyote scat must get there from the stomach contents of some of their prey. Also, some grasses eaten by coyotes never make it to their scat. Mom’s green shoots of grass assuredly left her body. I expect they later exited from her rear because they did not come up during the ten minutes I had her continuously in my sight. In my own dogs, I’ve noticed that when they eat grass leaves from my lawn, they do throw up. However, when they eat long, tender, wispy green, and succulent stems of uncut grass in my local park, my dogs don’t. My dogs love those shoots, pulling on their leashes to make sure we visit the long grass; and later pulling against their leashes when, finally bored, I begin to move them away. Mom too, seems to be enjoying her greens as much as my dogs do. Perhaps she knows not to eat too much grass leaf in order to be sure that the parts of the grass she does eat will indeed stay down.