by Jerebear » October 27th, 2017, 3:27 pm
In general if you are curious if a particular buff affects pet exp, look up the item on wowhead. There is usually a clickable link to the spell/buff there which takes you to the page for the buff itself. In the list of effects look for Aura #420. That is the pet experience increase aura. Only 3 items carry it at the moment. Pet Treat, Lesser Pet Treat, and Darkmoon Top hat. Sign of the Critter also carries this aura.
Carry Pet Experience Reference Guide:
http://www.warcraftpets.com/community/forum/viewtopic.php?f=10&t=8829