I had my pet bird in the freezer for at least 8 years.
The bird died on a stormy day so I didn't want to go out and bury him. And then I just forgot about it.
I finally just buried him earlier this year when I cleaned out the freezer.
I currently have 2 of my favorite old first generation breeder rats in the freezer because my boyfriend put them there when they died this summer since I wasn't home at the time. I either forget that they're there or I'm too busy to bury them when I do remember. I would have been really sad if he tossed them in the trash or into the ferret cage like what I usually do with other deceased breeder rats. These two are sentimental to me and were pets.
I don't really consider myself a "Ferret Person". Yes, I have ferrets, but I'm not a "Ferret Person" if you know what I mean. But MANY ferret people stash their dead ferrets in freezers for years on purpose.
They wait to collect like 30 ferret bodies together so they can all get a discounted rate on cremation. I think that's kind of ridiculous just to save some money. Not to mention, I wouldn't want someone else s' pets mixed in with my animal's ashes. This is a super common practice in the ferret community.