The eagle is Valoriel, a pediatrician by day and the superhero Expanda-Eagle by night. The ram is Derin and a member of the Delta Force detachment of the police department, a unit that specializes in handling superbeing incidents. During one such incident Val met the team and became good friends with them. He found out that Derin had an interest in his powers of inflation and so Val decided to give the ram a little firsthand demonstration and it looks like the musclebound Derin is actually enjoying it.
Done for me at FC '08 by Cooner. You rock, man. :)