It might not be cheaper, but it can be a lot healthier! I once ran into a site with a very good recipe for cat food. She used chicken meat with all the additives needed for cats (I can't remember exactly how it went but I can put a link here if the forum rules allow it). A lot of store bought food is really bad, feeding them dry food is not a good thing on its own and the food is usually produced as cheaply as possible. Our own table scraps are also pretty bad for our pets, since some of it can be very harmful and most of it is not beneficial for them at all. Cooking for your pets takes a lot of research, but you'll know exactly what your pet is eating, and it's a lot healthier food. You could easily make a months supply at a time, so it wouldn't take a lot of time either. I plan to start as soon as I get the right condition, and I would recommend you to look into it too