Is this zoo pet friendly

As stated already, dogs are only allowed on special days. See the link below https://www.elmwoodparkzoo.org/event/dog-days/all/ You have to register in advance and submit shot records for your dog.

Dogs are only allowed in the zoo during Dog Days and Yappy Hour events. Tickets for both events must be purchased in advance.

Will, did you NOT read the above answers???? No seriously

Dogs are allowed.