there need to be more options for Duid of the Moon, just giving a bear which in theory a regular druid should be able to transfrom aint right please consider following list.
cr 1/4
Cat
Boar
Mastiff
Mule
Panther
Rat
Riding Horse
Wolf
CR 1/2
Black Bear
Crocodile
Constrictor Snake
Poisonous Snake
Reef Shark
War Horse
Gaint Frog
CR1
Dire Wolf
Brown Bear
Giant Eagle
Giant Spider
Lion
Owl
Pseudodragon
Tiger