Sully loves going to the beach and chasing SEAGULLS.

When we visited New York City and went to Central Park, he loved chasing pigeons too, haha.
When we visit my in-laws, Sully loves chasing their chickens!

We've gotten some FUNNY videos of that, LOL!
Sully and our cat, Penny, are good friends and they often chase each other around the house as well.
And, like Sophie, he loves being chased more than anything! He crouches down with his front half on the floor and his back half sticking in the air, tail wagging, and does a talking-sort-of-bark at me and wiggles around in that position till I chase him around. That's his favorite game in the morning when we go to work.
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TCC - those two petstages toys are Sully's favorite! He's loved that one with the strings since he was a tiny puppy...he loves chewing on strings, lol.