Mixing meat sources for raw
I'm considering switching my cats to raw. I have two cats - an 8 month old female kitten, Sora, and 2 year old male cat, Stirfry. I've been feeding them Wellness canned for the past 6 months-1 year. I occasionally switch in other brands for a meal just so they don't get too tied up on a specific brand.
At my local grocery store they sell beef liver and beef hearts regularly however they don't sell turkey or chicken organs. Would it be ok if I use beef liver/hearts then chicken or turkey for the rest of the meat ?
I'm a concerned that my freezer space is too limited (1 bdrm apt) to be able to order raw parts online and store them but I also don't have a car so tracking down parts outside of my local grocery store is a real hassle.