Animals (Harvest Moon: 64)

Cows

 * Your cow starts off as a calf. It takes 1 full season to grow to adult size. Until it's an adult, it cannot be milked.
 * You can buy the milker from Rick's Tool Shop.
 * In order to increase affection, you must brush and use the milker on your cow every day.
 * If cows get sick, buy Animal Medicine from Green Ranch.
 * If you want another calf, you can get your cow pregnant with the Miracle Potion from Green Ranch. Cows are pregnant for 21 days until they give birth. During this time they will give lower quality milk.
 * Cows have their own festival on Fall 4th. If your cow wins, it will produce Gold Milk.
 * You can have a total of 8 cows and/or sheep combined.
 * Cows and sheep can graze outside in grass fields.

Chickens

 * Chickens only have one item they produce: eggs, and they always sell for the same price.
 * You have to buy Chicken Feed from Green Ranch. Chickens can't eat the fodder you produce on your farm out of your grass fields.
 * It takes 4 days to hatch into a chick from an egg. It takes 10 days to become a chicken.
 * If you leave your chicken out in a Typhoon, it will blow away. If it's left outside, there's a chance it will be killed by a wild animal.
 * If chickens get sick, feed them. They don't need the Animal Medicine. It takes 1-2 days for them to produce eggs again.

Sheep

 * Your sheep starts off as a lamb. It takes 1 full season to grow to adult size. Until it's an adult, it cannot be sheared.
 * You can buy the clippers from Rick's Tool Shop.
 * In order to increase affection, you must brush and use the clippers to shear your sheep every 7 days.
 * If your sheep get sick, buy Animal Medicine from Green Ranch.
 * You can have a total of 8 cows and/or sheep combined.
 * You cannot sell a sheep to Green Ranch unless it has its wool at the time of the sale.
 * Cows and sheep can graze outside in grass fields.

Insects and Wild Animals
You can't sell, keep, or do anything with these creatures besides pick them up and show people them.

Trivia

 * You can also pick up and show people Jiro and Taro.