Apparently so...

"
Not only do animals enjoy the deed, they also likely have orgasms, he said. They are difficult to measure directly but by watching facial expressions, body movements and muscle relaxation, many scientists have concluded that animals reach a pleasurable climax,"
-quote from Livescience

Somehow i'm imagining my hammies in that state. Cute <3
I want to see a mass hammie orgies! LOL! (Just kidding, the males will prolly fight even before they take note of the females.)