You can send animals to animal contests, it costs a lot of money. They get more chances to win the contest the more hearts they have.
You can send only one animal at a time, and it takes two days and they return on the third.
Once an animal wins a contest they become prize winning animals and get a star(silver, gold,iridium). The more stars they have, the better chance they have to special animal produce in the day besides their normal produce.
Cows can make chocolate milk. Chocolate milk is an universal loved gift. You can take the chocolate milk and put it in a cheese maker and make milk chocolate (a better type of chocolate that gives you luck and speed). Big chocolate milk means 2 milk chocolates(with chances for more based on the star of the big chocolate milk)
Sheep make golden wool. The golden wool is a consumable that gives you a regen for HP and energy that lasts an in-game day. You can also make golden cloth that would IMMENSELY give more money if dropped in Emily’s clothing business.
Chickens get white or brown kinder eggs(Blue chickens get blue kinder eggs). A white or brown kinder egg has the chance to give you any item in the game when consumed(Or multiple items up to a total price of 10000 rounded down). A blue kinderegg only gives fruits. All types of kinder eggs can be made into kinder mayo that gives a random benefic bonus that lasts an entire in-game day.
Void chickens get premium kinder eggs that gives items of a double total price compared to normal kinder eggs. So if a kinder egg gives items totalling 10k this give 20k.
Ducks get golden egg(for when they make an egg) and the crystal feather(for when they make a feather). You either smelt the egg into golden bar(the same golden egg as the beanstalk), or you can make an awesome golden mayo that when consumed makes every item collected that day to have +1 quality level and a chance for an extra quality. Crystal feathers can be crafting items for a few high tech inventions made by Maru, or you can consume to be ignored by all the monsters except those you attacked.
Rabbits get a four leaf clover that is a crafting item for all the rings with luck crafted by Haley. Or you can consume to get +4 luck for the entire day.
Goats get milky delight. It can be consumed for bonus speed and double attack damage for an entire day. It cannot be made into cheese.
Pigs get ambrosia, it cures all negative stats, restores energy and health to max and gives +2 to all skills for the day. It can be made into nectar at the oil maker, nectar give +8 skills in a random skill that isn’t boosted by nectar. Ambrosia can stack, you can have a maximum of 4 nectar used in a day. Nectar can also be gifted to somebody that have a skill to boost them for 2(may more) days.
You can send animals to animal contests, it costs a lot of money. They get more chances to win the contest the more hearts they have.