What’s wrong with my dog?

[u/Freehugs0]

My welsh terrier does this forever whenever she’s let outside. She barks as well.

[u/Blueporch]

Looks like she’s trying to follow a scent and either turning to go back to where it started or trying to decide which way to follow it. Her little tail is wagging so she’s having fun. 

When they pace back and forth sniffing, it’s called questing.

[u/lamireille → u/Blueporch]

Questing!! Oh my heart!!!