Definitely get some! Our cat loves it - we keep it growing all the time. It's a little pricey to buy the packs that you just add water to though. What we do is to purchase one of those containers (with seed, and growing mix included) then just divide it amongst 2-3 smaller containers. Each pot usually lasts 2 - 3 weeks (or more) before it starts to die off, so if you start a new pot every 3 weeks or so, you always have a fresh pot. Plus, there's less waste with the smaller pots, since the grass eventually dies off before it gets eaten.