Darren got it all, thank you!
The live animal exhibit trail is open daily from May 1 through November 1, 9:30 a.m. to 5:00 p.m. (last admission at 3:30 p.m.) Offices are open year round from 9:30 a.m. to 4:00 p.m. Source: Their website
Thanks! Your answer is awaiting moderation.