The second option to advance and intensify this practice is adding a Forearm Balance after the Dolphin Variation of Adho Mukha Svanasana.

With your forearms on the ground in Down Dog, walk your feet forward to bring your shoulders above your elbows and your hips above your shoulders as much as they will go.

Extend one leg out behind you keeping your hips square and start hopping off the ground with your other leg. Once your straight leg has come on top of you, try to lift the other one up as well and balance in Pincha Mayurasana on your forearms.

This pose is not only great to open and train your shoulders but strengthens your whole core.