Based on the original scoring guide;
Cincinnati: 170 (160 without sea lions)
Rhinos - (Black, Indian, Sumatran)
Bears- (Black, Polar, Spectacled)
Elephants- (Asian)
Giraffes- (Masai)
Zebras- (Grevy's)
Apes- (Gorilla, Bonobo, Orangutan)
Lions- (White)
Tigers- (Malayan, White Bengal)
Hippos- None (Though there are plans for Hippos in the future)
Extra:
Meerkats- +10
California Sea Lions +10
Columbus: 130
Rhinos- (Black)
Elephants (Asian)
Lions (African)
Tigers (Amur)
Bears ( Black, Kodiak, Grizzly, Polar, Bornean Sun)
Apes- (Gorilla, Orangutan, Bonobo)
Giraffes- (None) [African Savannah]
Zebras- (None) [African Savannah]
Hippos- (None) [African Savannah]
Extra:
Koalas +10
Cleveland: 180 (160 without seals and sea lions)
Rhinos- (Black)
Elephants- (African) *Even though they are in Columbus at the moment, They'll be returning soon so I included them*
Lions- (African)
Tigers- (Amur)
Bears- (Grizzly, Polar, Black, Spectacled, Sloth) *It says they have Sun Bears too but I thought that they sent them to Honolulu*
Apes- (Gorilla, Orangutan, Chimpanzee)
Giraffes- (Masai)
Zebras- (Grant's)
Hippos- (None on display)
Extra:
Meerkats +10
Koalas +10
California Sea Lions, Harbor Seals +20
Louisville: 140 (110 without seals and sea lions)
Rhinos- (Southern White)
Elephants- (African, Asian)
Lions- (African)
Tigers- (Amur)
Bears- (Polar)
Apes- (Gorilla)
Giraffes-(Masai)
Zebras- (Hartmann's Mountain)
Hippos- (Pygmy)
Extras:
Meerkats +10
California Sea Lions, Grey Seals, Harbor Seals +30
Memphis: 170 ( 160 without Sea Lions)
Rhinos- (Southern White)
Elephants- (African)
Lions- (African)
Tigers- (Sumatran, Bengal)
Bears- (Polar, Black, Grizzly)
Apes- (Gorilla, Bonobo, Orangutan)
Giraffes- (Reticulated)
Zebras- (Grant's)
Hippos- (Nile)
Extras:
Giant Pandas +10
Meerkats +10
California Sea Lions +10
I added Seals and Sea Lions to the list as I have found that they are also always very popular animals.
It's also quite interesting to see that the Columbus Zoo, which I know by many would be considered the best zoo on the list, ranks the lowest, and Cleveland, which many would consider one of the worst on the list, ranks the highest. Of course once the African Savannah is built in Columbus, with the additions of zebras, hippos, giraffes, African Elephants, and the addition of Indian Rhinos to the Asia Quest region, the score will increase to around 180.