Did you know that "cat grass" is the same as wheat grass? Have you ever tried wheat grass juice? Years ago, during some health-foody phase, I ordered a shot of it. It wasn't exactly what I would call easily digestible. I think there is a reason that cows have two stomachs. Yet cats only have one and they seem to like it well enough.
I picked this small tray up at the greenmarket for just $3 and was told it would last a few weeks. Pound cat took an immediate liking to it and comes around to munch a few times a day. Here's hoping it will help his digestion even though it did nothing for mine.