I don't know if this is a bug but, when you kill a horse that has an equipped horse saddle it will drop a regular saddle.
MC-13888
Horses With Saddles Drop Pig Saddles
Resolved
Duplicate
0
Timothy Ngo
(Unassigned)
Unconfirmed
Snapshot 13w16a
Retrieved
Duplicate of MC-13627, please use the search function to see if your bug has already been submitted. Currently over 54% of tickets are being closed as duplicate.