DISCLAIMER AND CREDIT: I am not a halachic authority (nor do I play one on tv). All the lists and guidelines mentioned here came from two excellent halachic sources. I consolidated as much as possible and tried to copy verbatim whenever I could, but please doublecheck with these guides before purchasing any Passover-approved pet food:
These lists are good only for Passover 2020 ONLY. I urge you to consult with your local halachic authority and not to rely on Rabbi Internet for any halachic questions you might have regarding pet food on Pesach.
On Passover/Pesach, according to halacha (Jewish law), a Jewish person may not even "derive benefit" from chametz, which means that while your pets do not need to keep kosher, you may not feed them food containing chametz on Pesach. You many, however feed them food containing
kitniyos, such as rice or corn (even though Ashkenazic Jewry has a very strong custom not to
eat kitniyos on Passover, but that only applies to people, not dogs).
Per the Star-K, you don't need to buy a new food bowl for your pet on Pesach, but you must wash out your pet's bowl very thoroughly and remove all traces of old food.
The lists below were taken from the two kashrus sources cited above, the CRC and the Star-K. Even when purchasing a brand name mentioned on this list,
make sure to check all labels, and if you see an ingredient that gives you pause, call or email a halachic authority.
There should be no chometz listed.
FYI, there are very few reasonably-priced dog treats that are kosher for Passover, so here's what we do. (This is for gebrokts-eating homes only.) After a meal with chicken soup and matzoh, when we clear the table, we dump all the leftover soup (make sure there are no bones!) into a plastic disposable bowl and then break up all the leftover matzoh into the leftover soup. The matzoh absorbs the soup. Then we give it in little bits to our dogs as treats. They love it. Awesome frugal treat.
