It will come out after Zynga finishes it. There is no specific level that you can Cross-Breed on, but it really is a bummer that it hasn't came out yet.
yes
usaully level 17 but some people it doesnt work untill 23
A macaw
Walrus and a owl
An Ocelot is a cross breed between a Cheetah and a Puma in Tap Zoo
Rhino
You have to cross breed a gorrila and an Africian buffalo.
a howler monkey
A Rhea and a Jaguar.
A zeian
Cross Breed a Cheetah and a Scimitar Oryx. It will cost 5,500,00 coins.
Zoo club is an interactive online game. You can create cross breeds of different animals to create a new species.