I've always found that regurgitated dry cat food has been more benefical for my components than regurgitated canned cat food. Purina kitten formula is by far the best in my auditioning so far.
Inexpensive tweak
Just got back from a business trip to find that our cat had thrown up on my Audible Illusions preamp (unfortunately vented on top). Everything was dried up. Haven't looked inside yet. Not sure how to clean a circuit board. But I've noticed that my system is more revealing than before. I won't share details of exactly where on the preamp my cat got sick because I might want to try to market this tweak sometime in the future. :-)