she likes carrying around random rags for no reason
This is actually a common trait of golden retrievers! They’ll do it with toys, socks, rags, etc. Holding things in their mouths acts kind of like a pacifier to them and is much like a coping mechanism to help them handle their emotions (both good and bad). Our golden usually grabs our socks and carries them around when happy to see us, or when she gets scared or embarrassed.