You don't need to read this thread, those are just tips
I use 2:1 for year jumps and would like to trade my 2008-2010 rares for newer ones if possible!
My preference for species:
Tier 1
Lions | Malk Dragons | Warrior Cats | Cinnabun | UR strawberry | Cerberus | Sleipnir
Tier 2
Malk Cats/Dogs/Wolves/Foxes
Tier 3
Dogs | Fennec Foxes | Tree
Tier 4
Cats | Squids | Bunnies | Bwolves | Eastern Dragons
Tier 5
Cows | Bats | Spiders | Chickens | Horses | Fish | Deer | Hamsters | Western Dragons | Macaw | Guinea Pig | Malk Horse | Tess Dragon | Owls | Nicks | Unicorns | Zebras | Tess Horses
Tier 6
Ponies | Rats | Chameleon | Monkey | Fruits