Calgarians have another Grey Cup challenge on their hands — this time from the Toronto Zoo. 

John Tracogna, the CEO of the Toronto Zoo, has publically challenged Calgary Zoo CEO Dr. Clément Lanthier.

Whoever’s team loses on Sunday will have to wear the competition’s jersey and thoroughly clean out an animal enclosure: the penguin enclosure in Calgary, and the giraffe house in Toronto.

Here is Tracogna's invitation for the challenge:

And Dr. Lanthier’s response: