BUR #44069 is pending approval.
mass update favgroup:45150 -> long_animal_ears
Related to topic #32599.
I would like to be able to search for this, and until I realised long_ears was actually a pointy_ears alias, I was under the impression I could. This favgroup contains all the posts I mistagged (and have since corrected) because of said alias, which should serve as a good starting point.
As for what constitutes as "long", I think the guidelines should be ears that are shoulder-length or longer. For more rigid ears, I think they should be measured as if they were floppy, ie. a pair of fox_ears could be tagged long_animal_ears if they'd reach the shoulders were they to suddenly go limp.