They can be safely frozen for a very long time. There's a good chart at the end of the linked page.<br><br><br><br>
Welcome to VB!<br><br><br><br><a href="http://www.fsis.usda.gov/Fact_Sheets/Focus_On_Freezing/index.asp" target="_blank">http://www.fsis.usda.gov/Fact_Sheets...zing/index.asp</a>