When choosing an old male hamster, it should be noted that the old male hamster is 4-5cm long, weighs 40g, and the old male hamster has yellow hair, white beard, white eyebrows, and round ears.

In addition, it should be noted that if the hamster has eye mucus, a runny nose, and the coat color is not clean , without luster, with dry and shedding hair; ears with mutilated or bitten marks; limbs are not healthy, with mutilation. Such an old male hamster must not be chosen.