You don't. Alchemy is a false science. Even at the time when they thought there was such a thing as alchemy, they had no clue what genetics was. So they probably didn't know either, and even if alchemy was real and you managed to figure how to engineer a cat from like a piece of lead or something you would probably be hanged as a witch. So there really is no way.
Android+bee
Human and shark
Kangaroo and guppy
Bat+alien
Ant + Eagle
Bear + snail
Raven + dove
Dwarf+segacious
Horse + manul
Ant + Scorpionfish
mink+chinchilla
Shrimp + vampire