Pet sizes
Cats and dogs in intermediate stages between birth and maturity
2.1.0 dogs
Updated "Brown" and "Cream" wolf textures, and new St. Bernard
Village Cats
"Ordinary" cats roam villages
Non-random skin
Ocelots and cats keep their skins when tamed!
New Dogs
Rejoice! New dog types!
Pet Names
Random names for witches' cats!
Dye-able Collars
Tamed cats now have collars that can be dyed, like wolves!
New parrot breeds
New parrot breeds in v2.0.0: Golden, White, Black, Rosy-Faced, Dusky, African Grey, Galah, Rainbow
Swamp Buds
A witch's best friend
So Many Cats
There are now multiple possible cat and dog skins. Twelve are backported from 1.14, one is an unused skin from bedrock edition, and the rest are custom skins.
Spawn Eggs
There is a dedicated egg for a named black cat, and there are eggs for the Parrot varieties in 1.12.
Calico comparison
Comparison of vanilla calico (left) and Winslow (right)