Disbanning Pets?

How do I disband my pet? I asked around and no one seemed to know, and one even told me it was a bug. What's up?

There are pet collectors.
Visit the ruins of Old Ascaron and you should meet one not far from the entrance.

Jarrel the Tamer can take your pets from you if you want to get rid of them. I know in ruined Ascalon, he's just outside the gate from Ascalon City- I believe there's a tamer right next to Master Ranger Nente in pre-searing Ascalon as well that you can use to change pets if you're still in that area.

Your best off to stick with one pet so they go up in level with you. I believe if you get a new pet he goes back to his starter level.

This is true- however, if you want to have a certain type of pet, you can pick up intermediate pets until you reach the point of the game where you can acquire the pet you want. If I'm building a beast master ranger that I want to have a warthog on, I don't want to wait until the Wilds before I get a pet- I'll pick up a Moa Bird in Ascalon, and keep him around until I get the pet that I want. Although a new pet doesn't keep the experience your old one had gained, pets later in the game start at higher levels, so trading out a Moa Bird for a Snow Wolf won't always lose you too much progress.