I've noticed this mod is one of the only mods available for Fabric that add back the MC Earth Mobs, and that other mods for other loaders tend to have more interesting content to them. Because of this, I'd like to suggest some enhancements to improve the mod and expand it's content so it is on par with the other Earth mods.

• Cluckshrooms should be shearable to obtain red mushrooms, in return turning the cluckshroom into a normal chicken like mooshrooms. Also, make cluckshrooms seek out shade and darkness, like they did back in MC Earth.

• Fancy Feathers should be useable, allowing one to craft "adorned arrows" which deal increased damage and fly farther, but cannot be tipped with effects. Also, fancy chickens should be afraid of pigs, like they were in Earth MC. Perhaps fancy chickens could also have the ability to make chickens follow them similar to llamas?

• Muddy pigs should only have a chance to get a tulip on their head when resoaking themselves with mud. Additionally, the tulip should be able to come in all colors! Also, allow muddy pigs to muddify themselves on the new mud and rooted mud blocks in 1.19.

• Inky Sheep should drop white AND black wool.

• Long Nosed Sheep should drop a new wool variant that matches their wool color, known as "beige" wool. Beige wool could also be made by crafting brown wool with light gray dye or light gray wool with brown dye.

• Rocky Sheep should drop gray AND light gray wool.

• Horned Sheep horns should be able to duplicate a goat horn if crafted with one. Horns should also be craftable into bonemeal.

• Option for Rainbow Sheep to not spawn naturally, and instead be made whenever two "jeb" sheep breed as the offspring.

• Wooly Cows should drop a new wool color that matches their actual wool instead of brown, that color being "tan" wool. This wool could also be made by combining brown wool with white dye.

• Umbra cows should similarly drop their own wool, called "umbra" wool, which can also be made by mixing purple wool with black dye or black wool with purple dye.

• Jumbo Rabbits should have a 100% chance of dropping a rabbit's foot, like they did in MC Earth.

• Furnace Golems should hand out torches randomly when stared at by a player similar to how iron golems hand out poppies, as they did in MC Earth. Perhaps instead of randomly, they'd do it if you gave them sticks by dropping some at their feet? Would save up coal for smelting.

• Carved Melons should shoot out melon seed projectiles if powered with redstone, similar to a dispenser.

• Tropical Slimes should be able to breathe and hop around underwater at the ocean floor, as they did in MC Dungeons. They should also be able to be shrunken by clicking on them with a bucket, giving you a bucket of tropical fish in return. You could also make them bigger with buckets of tropical fish. Shrinking them would aggro them. This is based off how it was implied you could bucket them in the original MC Earth.

• Viler Witches should rarely drop lapis lazuli and should be immune to harming and poison potion damage, as they were/did in MC Earth.

• Skeleton Wolves should be neutral to players wearing a skeleton skull, allowing them to be tamed with rotten flesh as a undead comrade. They won't follow you unlike normal wolves when tamed, but you can tell them to sit and they will still defend you. Also, they should not be able to drown or swim, simply sinking to the bottom of the water, which could be useful for underwater fights.
  You could heal them with bones, bonemeal, or milk buckets. (Milk is consumed from the bucket when used to heal them.)

Additionally, there were some unimplemented mobs revealed when MC Earth shutdown. Those would be really neat to have in the mod as well! I'll list some ideas for them below.

• Hyper Rabbit: Could be made if a jumbo rabbit was struck by lightning. They'd be really fast and able to jump even higher than normal jumbo rabbits. They drop a single hyper rabbit's foot, which can be used to brew potions of leaping III which could be upgraded to leaping IV or extended with redstone.

• Magma Cow: Could be found spawning in herds in basalt deltas in the Nether. They would be immune to fire and lava, being able to walk on lava similarly to striders. They would be neutral, and only attack you if milked or if you hurt them. Milking them with a bottle would give you a potion of fire resistance. On death they would drop magma blocks, leather, and raw beef like normal cows. They would also take damage and sink in water, but not in rain. When attacking, they'd have a chance to set you on fire.

• Mossy Sheep: Mossy Sheep would spawn in lush caves in herds, and would be able to eat moss carpets in order to regrow their wool. They could be sheared to obtain moss carpets and white wool, and would behave like normal sheep otherwise.

• Teacup Pig: Teacup pigs could be created by feeding a normal or pale baby pig a poisonous potato (since IRL teacup animals are mostly just ill or malnourished baby animals sold by unethical people), causing them to shake and eventually transform into a teacup pig. These pigs would hop into flower pots and eat any flowers they find in them, getting the respective suspicious stew effect depending on the flower. You could cure them back into a normal or pale baby pig with a golden carrot if you feel bad for them, like a sane human being.

• Zombie Rabbit: Has a rare chance to be created when a zoglin kills a rabbit. (Excluding hyper or jumbo rabbits.) Is hostile similarly to killer rabbits, although they are faster and burn in daylight. Their attacks also have a chance to inflict bad luck. They also cannot swim, but do not drown either. They drop rotten flesh, and are damaged more by smite weapons. They also heal from harming potions + are immune to poison and vice versa since they are undead. Despite being undead, you can still attach them to leads. They will attack other rabbits and have a chance to convert them into more rabbits. They can be bred with raw rabbit, which they can eat off the ground to enter love mode, creating more (although baby) zombie rabbits. I think you see the picture here, they're pretty nasty and can swarm easily. Perhaps you could also cure them with a slowness potion and golden carrot?

That's all my ideas! Feel free to implement them or reply if you're a dev!