Trying to figure out if my older dog actually likes our new puppy.

Hello my fellow dog lovers,

The black and white Chihuahua/Rat Terrier mix is almost 8 years old. He’s a rescue, and it’s pretty clear he never had any real social training. On walks, he lunges and barks at every dog he sees, though he’s usually calm around other dogs when he’s in doggy day care.

The tan German Shepherd/Boxer/Husky mix is an 8-week-old puppy. We just got him and the two of them have been interacting like this for almost a week now.

Are they actually playing, or is the older dog being aggressive?