This was a spontaneous shoot; and I didn't have the treats cut into small pieces before starting, which is why the treats are a little late. But, you can get a feel for the process; and how fast it goes. My hands always return to my sides after each treat.
Your concern is valid. You pup is exhibiting classic stress signals: dilating pupils, lip licking - most all the pup's other behaviors. Isolation from the "pack" is a life threatening situation, causing increased release of hormones like cortisol, increased heart rate & blood pressure, slowed dig...
This was a spontaneous shoot; and I didn't have the treats cut into small pieces before starting, which is why the treats are a little late. But, you can get a feel for the process; and how fast it goes. My hands always return to my sides after each treat.