I got Rhea's Last Egg yesterday. (I just about cried at the end of that quest chain. Gorramit.) I put it in the bank next to Gus' First Aid Kit and the Barov Servant Caller. There are a few others like that, too. Just like back in the old days, they're taking up bag space, and for what? Make them vanity pets!
It would need a unique model first, but yeah, this particular item might have been nice as a pet. Quest reward pets are still a few and far in between. Gasp, doing something that's actually a goal with a reward? Imagine it!
I would love to have a little Rheastraza as a pet. (I think that's Rhea's full name, but my dragon lore is a little rusty.) But one of my favourite quest chains, only beaten by Welcome to the Machine in Hillsbrad Foothills.