From left to right, top-down:

Thunderbolt (From my 101 Dalmatians Comic "Thunderbolt meets Amelia")
Skye (From my Paw Patrol Strip "Skye's Aircraft Maintenance Checks")
Rocky (From my Paw Patrol Strip "Rocky's Landing")
Everest (From my Paw Patrol Comic "Everest's Ski Jumping")
Chase (From my Paw Patrol Strip "The Mission Is Completed, SIR")
Kobe (My OC for Thunderbolt Comic "Thunderbolt meets Amelia")
Jenna (From my Balto Strip "Your Parachute Is Beautiful, Jenna")
Miltank (From my Pokemon Strip "Miltank's Wonderful Gift")

and the last one -- Dumbo (From my Dumbo Strip "Dumbo's Reunion")

Go check out my gallery to understand those background stories.