No, very normal in dogs & cats. Sometimes it comes out on the other end...and SOON! And sometimes they keep it in their tummies. I have read some like it like we like salads. But they DO do this sometimes if their tummy is upset. It is GOOD for them...lots of good stuff in grass. The other person was right, NO chemicals on the grass.
Don't worry about it. Most dogs and cats eat grass to help themselves throw up/calm their stomachs. I think of it as Stomach Medicine for animals... Unless you use pesticides on your lawn frequently, or have recently put down lawn feeders/weed killers don't fret.
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