Kind of a dumb thing for a topic but I wonder if anyone else ever noticed...
In the Avatar the Last Airbender series and Legend of Korra as well, for Appa and the other Skybison, when it shows them with the saddles on their backs, there are no straps on them to help keep the saddles from falling off. What? What's keeping the saddles on then? sweatdrop
When it shows Korra's Polarbeardog Naga with her saddle on, it has straps. xd
Ha I just imagine that the people that drew everything were too lazy to add the straps to the Skybisons saddles. xd