Why does my dog steal socks and other non food items too

Whether it is food or a sock, the common thread is often simple opportunism: an item is accessible, interesting, and carries an appealing smell, particularly items that smell strongly of a person, which many dogs find just as rewarding to grab as an actual snack.

If stealing a non food item reliably triggers an exciting chase or a big reaction from a person, some dogs learn to repeat the behavior specifically for that response, separate from any interest in the item itself, which explains why some dogs steal items they show no interest in chewing or eating.

Keeping tempting items, food and otherwise, out of reach, along with training a reliable leave it and a calm drop it cue, addresses the shared opportunistic root of both behaviors rather than needing entirely separate approaches for each type of item.

A dog that grabs a sock and immediately gets an exciting chase around the house has just had one of the best games of its day, regardless of whether the item is ever recovered, which means chasing directly reinforces exactly the behavior an owner is trying to stop. Calmly walking toward the dog rather than running, offering a trade for a high value treat, and staying genuinely unbothered in tone and body language removes the exciting game element entirely, making the whole activity considerably less rewarding for a dog that was hoping for a chase.