SmartyKat Sweet Greens Cat Grass Kit

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World Wise Pooch Planet
Pros: easy to grow, grew very quickly, was not messy
Cons: cats had no interest in it
It's possible my cats aren't interested in cat grass in general.  I haven't tried them on any other cat grass.  I grew it for them and they sniffed at it a bit, then ignored it.  I ended up throwing it away.  It was very easy to grow and mess free.  It grew insanely fast.