Ontario

The only thing in that area that I can think of that might fall under the heading "zoo" was a small petting zoo that I vaguely remember as fronting on Hwy 11 in the general area of the Tri-Town many years ago. I doubt they had any big cats. Certainly they wouldn't have been able to afford enough of them to get a breeding population from any escapees.

Melanistic cougars I might believe, or escaped animals from a lot further south.