Success for the past 18 months with this
I've tried various cat grasses over the years. I use only half a pack, sometimes just a third, wet it thoroughly in the dish and drain; then every day wet it through, then drain immediately. I use the Catit grass system as it reduces the mess when they pull out grass strands and growing medium. No problems with this approach, all packets have grown well. I plant every 10 days or so, have a new one growing on the windowsill while the other is in use.