I hope they leave the Dog and Horse for last since we already have Rapidash and Arcanine. Personally, I wanna see how they'd tackle a fire goat pokemon.
Goats are associated with Capricorn, which is an earth sign. Rams are associated with Aries, which is a fire sign.
I'll give you an opportunity to absorb this information and try again.
This is the Chinese Zodiac being considered, which has twelve animals (one of which is a goat), and five elements (one of which is fire) that cycle. Fire Goat is definitely a thing in the Chinese Zodiac.
Plus there's plenty of depiction of the devil and demons in Judeo-Christian mythology with goat-like features.