1. Chicken: Chicken is a kind of poultry. Domestic chickens come from wild chickens, and the domestication history is at least about 4000 years, but it was not until about 1800 that chickens and eggs became mass-produced commodities. The types of chickens are turkey, black-bone chicken, pheasant and so on.

2. Sparrow: it is the general name of 27 species of birds in Sparrow. Their body shape and color are very similar, and their upper bodies are generally brown and black, so they are commonly known as sparrows.

3. Hamster: * * 7 genera 18 species, mainly distributed in arid areas of Central Asia, with a few in Europe. Hamsters are 5 to 12 cm long and chubby.

4. Guinea pigs: also known as guinea pigs, Dutch rats, Dutch pigs, sea pigs, etc. Zoology is divided into mammals, rodents, guinea pigs and guinea pigs.

5. Hairy mouse: The first half is like a rabbit, the second half is like a mouse, with big and blunt ears and fluffy tail. Eyes are bright, and there are many long beards on both sides of the nose. The fur of the standard chinchilla is blue-gray, the abdomen gradually fades to white, and the abdomen has a clearly demarcated white belt.