All I was told was the zoo only has seven male mouflons. No females.
It is entirely possible the script has a typo because how often does auto correct mess things up. Or the writer could have goofed or been misinformed or took a guess. Since Mr. Wrinkly has had multiple conversations with multiple guides those are the most likely scenarios.
I have a suggestion for checking sooner. Anyone on twitter? I personally am not and wont create an account just to ask but the people who monitor the keepers twitter account tend to be up on things or can find out relatively fast. Someone could try asking there.
Finally the zoomobile narrators have corrected their information - it took a letter to the Manager, Guest Services.
Unfortunately they haven't been out lately when I have been there.