My guys love sprouts and I bet Zorro will too! I don't recommend the grapefruit seed extract though. It's advertised as natural but it's not, the antibacterial effects come from toxic chemicals in it. It can wipe out the beneficial bacteria in the gut. You could use a little bit of vinegar instead to help discourage bad bacteria.
Here's an article talking about the contamination issues with GSE:
http://chemicaloftheday.squarespace.com ... tract.htmlIf you have a natural foods grocery nearby, you can buy grains in the bulk bins and sprout those too. This is usually cheaper than buying mixes online.