Late to this post.
Been a busy bee over the holidays.
I date my rodents when they arrive vacuum sealed and when I open the seal and bag them in “freezer” ziplock bags.
My rule of thumb is 1 to 1 1/2 years max vacuum sealed and no more than 6 months ziplocked.
Medium rats come in ten packs and between Behira and Shayna they last about 2-3 months max in ziplock.
The other 4 snakes eat similar sizes or more often so I rarely waste much.
I also feed off mouse pinkies as an occasional treat to Frank, the Blue tongue skink.
Either way, not surprised a “picky” BP had issues with older rats. Boas and colubrids don’t seem to care as much, but I still limit to 6 months max.
Frankly, it wouldn’t shock me, if Shayna, my food snob/picky BP, asked for grey poupon with her rat!