hello,can anyone tell me how to take things out of the pet's treasure?

on your pets page, click the little down arrow to the upper right of the pet whose treasure you want to edit, then click "treasure" from the dropdown list. from that page, you can click the little X on the item(s) you want to remove.

(you can also get there by hovering over personal > pets, clicking "pet" under the desired pet's name, then choosing "edit treasure" from the list of links.