We had a dog that started to eat huge amounts of grass outside after spending too much time with a lamb. He once ate a bunch of grass laying on the field to dry to become hay. It continued to ferment inside of him until he started to projectile puke all over the stairs down from first to ground floor.

He specialized later and focused on dandelions and only digging up and eating the roots. Don't know, he was a weirdo :D

we got some grass treats and have been portioning them out to our kitties like pills

we hope it eventually helps the flatulence. like her favorite game is farting on me.

My cat also ate too much grass and throws up. I used to have this "cat grass" patch growing in the windowsill for him to graze on. But he ate it so fast that it didn't have time to regrow, and it got "redistributed" around the house. Silly creature. We don't have cat grass anymore.