In Update 23 (coming soon), there are changes to the ash pet tomes (cosmetic pet tomes that can be obtained for ashes or that dropped in Gorgoroth Steel-bound lootboxes).
https://www.lotro.com/forums/showthread.php?667064-Binding-Status-Change-for-Some-Cosmetic-Pets-in-U23
The tomes, which currently are not bound and can be freely passed, traded or sold on AH, will be come Bound to Account. If, like me, you have stashed extras in a storage alt on a different account, you must use the tomes on whatever characters you want, or move them to an account with level-cap characters before Update 23 launches.
One alleged reason for the change is that you will be able to turn the tomes into ashes (or the new equivalent).
If you would like any of these pets and do not have a high-level character to get them yourself, let me know. I have a bunch of extras I'm happy to pass along. If there is one I don't have that you have your heart set on, I can probably be persuaded to spend some ashes to get it for you. Note that you should contact me ASAP, since once Update 23 launches, it won't be possible to give you any of them.