How long will frozen beef heart mix last in a freezer?

[Solid]

I made some frozen beef heart mix 2 years ago and only used about half of it. Its been frozen in mini ice cube trays inside ziplock bags. It doesnt look like it has too much freezer burn or heavy frost on it. Do you think it is still good?

[rdiscus]

Your fish will tell you ... If they eat, it's still good