As most YT'ers, we have more than we need. The items that we use frequently are:
Harness Collar (for ID purposes only)
sweater....... yep, these little guys get cold
coat nightshirt/gown - we get ours from gofetch.com (a YT'er owned business)- they are in them EVERY night!!
a small blanket - Shelby & Seymour each have their own blanket in the familyroom... they love to snuggle up in them.