Most cat owners know the benefits of grass for their feline's digestive health.  Animals that are strictly indoor residents don't have easy access to grass, so it's up to their owners to supplement this need for their pets.  Most pet stores carry some type of 'ready to use' oat grass, however a combination of overwatering and artificial light in stores causes heavy mold growth at the base of the grass and on the root system, limiting life of the product and producing health concerns for both pet and owner.<br /><br />To avoid such issues, I've been in search of a good cat grass to grow at home.  After going through several other exceptionally poor products, I gave the Petlinks system a try.  The system comes enclosed within a round white plastic tub and contains everything you need to grow grass (container, soil, oat seed) except water.  The instructions are simple and clear, and allow individuals with 'brown-thumbs' to produce a lush, thick green product.<br /><br />The first step is to poke some small holes in the bottom of the container.  The product instructions indicate 4-6, however since I used a very small object (turkey skewer) to make the holes I ended up making ~15 holes across all areas of the container the bottom to allow for sufficient drainage. In the second step, you plant the seeds; the product instructions indicate you "stir in the seeds, ensuring most are covered".  If that is followed as stated, it could cause variability in the extent of your yield; while you may get sufficient growth, it probably wouldn't be optimal as it would be difficult to get sufficient soil coverage of the seeds.  A better idea is to remove about 1/4" to 1/2" of soil from the container (using a tablespoon) before sprinkling the seeds on the surface of the remaining soil in the container; lightly cover the seeds with the soil you removed to complete the planting process. By doing this, it ensures all the seeds are sufficiently covered and will grow to their maximum capacity.  The final steps are to place the container on a small saucer, water the soil with 1/4 cup water, loosely place the lid on the tub, and place the entire thing in a warm dark place (I used a kitchen cupboard).  Expect to see sprouts emerge in ~3 days (it will be quite evident as they push the lid up with their growth); once that happens just remove the lid, move the entire unit to a sunny location and keep the soil slightly moist.  You'll get full growth in ~7-10 days, though it will vary as some of the seed germinate faster than others.  This is actually a benefit as it makes the system more robust and provides a thick growth of the product due to the staggered sprouting.  Best of all, cats love it!  I've had to break up a couple fights between my two cats already over the first harvest.  :)  I've posted some photos of a 10-day growth (with a ruler included for scale) so you can judge the end result for yourself.<br /><br />SUMMARY:<br /><br />Pros:<br />  - Easy to use<br />  - Goof-proof instructions<br />  - Thick, healthy product that grows fast<br />  - Cats love it!<br /><br />Cons:<br />  - None