He arrived after Eurasia closed so I have only seen him at Red Panda Day last year and this year.
But he is easy; he is quite a bit smaller than Cassie; his face is not as round; his facial markings are quite different. Most of all, if the Panda is up a tree - Ralphie. Cassie was keeper-raised and does not go very far off the ground.
It seems the other female, Maki, is not coming back anytime soon. Safari Niagara is building an enclosure for her.
I doubt Cassie will ever return. She can't be bred so by not having her they could possibly bring in another female. Or at the very least concentrate resources on Cassie and Ralphie.
Regarding I.D. I should have mentioned Ralphie is a much deeper red than Cassie.
Will shortly post a picture of her to show the difference in their facial markings.