Hi, you don't have to worry about what cards you need. There's no way to collect specific cards other than buying the few random ones that are offered in the zoo shop daily for gems which isn't really worth it. All cards are received randomly from many different rewards including chests, airplanes, regatta, etc. Once you get the max amount of cards required (in that case 10/10) you'll get the animal delivered to your Zoo.
Ok...so it is giving me everything for tigers and I don’t get to finish the rino? Had I known that I would not have built the tiger enclosure. You may want to let people know this.