The trait -
Beast Bond: You share a close bond with animals. You gain a +1 bonus on Handle Animal checks and Ride checks. One of these skills (your choice) is always a class skill for you.
I picked it out of the list from http://paizo.com/pathfinderRPG/prd/ultimateCampaign/characterBackground/tra its.html#_traits
...but I have since learned that there are traits that I might want normally which are not PFS legal and I want to use the character that I gave this trait to in PFS play. Is there a complete list somewhere of traits that are allowed? If so, where would I find it?