1. Like to live in groups, with big head, short neck, round ears, no tail, hairy body, short limbs, four toes on the forelimbs and three toes on the hind limbs, with sharp short claws, and the habit of catching people. I don't like climbing and jumping, so I can keep it in a small concrete pool without a cover. Habit docile, timid and easily frightened, sometimes squeaking and screaming, like dry and clean living environment.

2. The sense of smell and hearing is developed, and it has a very high response to various stimuli, such as being extremely sensitive to sudden changes in sound, smell and temperature. Therefore, it is easy to suffer from pneumonia in the air turbid and cold environment, which leads to abortion, and it is also easy to abort when frightened.

3. Guinea pigs are herbivores with well-developed masticatory muscles and very thin stomach wall. The cecum is extremely large, accounting for about 65,438+0/3 of the abdominal cavity. The demand for crude fiber is more than that of rabbits, but it is not as easy to have diarrhea as rabbits.

4. Guinea pigs eat a lot and have a strong appetite for the food they are used to, but they are particularly sensitive to the deteriorated feed, so they often eat less or waste food, and even cause miscarriage. It is also particularly sensitive to antibiotics, and it is easy to cause death and enteritis after administration. If penicillin is used, it will cause small intestine, colitis and even death, regardless of dosage and route. The sensitivity to penicillin is higher than that of mice 1000 times, so we should be especially careful when treating with penicillin. Contrary to the mouse, it eats less and has less activities at night.

5. Guinea pigs belong to late-maturing animals, that is, the pregnant period of female rats is 63 (59 ~ 72) days. The embryo is fully developed in the mother's body, fully developed after birth, full of hair, eyes open, ears erect and permanent teeth. They can stand and walk for an hour after delivery, eat soft feed for a few hours, and suck breast milk and eat green feed after two or three days under the care of the mother mouse.

Note: Dutch pigs like to live in groups. Keep at least two!

1. Vitamin C cannot be synthesized in the body (liver and intestine), and the required vitamin C must come from feed. Humans, primates and guinea pigs lack enzymes to synthesize vitamin C. Therefore, when feeding guinea pigs, vitamin C should be added to the feed or water or fresh vegetables should be fed. Scurvy occurs when vitamin C is deficient, one of which is paraplegia of hind limbs, especially in winter. If vitamin C is supplemented, the symptoms will disappear.

2. The ear socket tube is sensitive and convenient for listening experiment. Guinea pigs are most sensitive to 700 ~ 2000 cycles/second pure tone, such as 2000 cycles/second audio observation of neomycin toxicity to the inner ear.

3. It can resist hypoxia, which is 4 times stronger than mice and 2 times stronger than rats.

4. Sensitive to tuberculosis, Brucella, Leptospira, Brucella, Diphtheria, Q fever virus and lymphocytic choroid plexus meningitis virus.

5. Guinea pigs are easy to cause allergic reactions, and the "complement" in serum diagnostics is made of guinea pig serum.

6. The thymus of guinea pigs is all in the neck, and there are two bright, light yellow, slender and completely lobulated glands between the mandibular angle and the entrance to the chest. The liver is divided into four main lobes and four lobules. The lung is divided into seven lobes, four lobes in the right lung and three lobes in the left lung.

7. The sexual cycle of guinea pigs is16.5 (12 ~18) days, the gestation period is 68 (62 ~ 72) days, the lactation period is 2 1 day, and the litter size is 3.5 (1 ~ 6).

Animal sexual cycles can be divided into multi-cycle (multiple sexual cycles in one year) and single cycle (one-time cycle in one year). Except primates, there are obvious species differences in the reproductive cycle of all mammals. Some animals, such as dogs, cats, pigs, horses and cows, have this periodic change only in the breeding season, and the reproductive organs are in a state of atrophy and rest at other times, but animals such as mice, rats and guinea pigs normally show a round-trip cycle of the reproductive cycle all year round.

Guinea pigs, mice, rats, hamsters and rabbits still have postpartum sexual cycles, that is, animals may become pregnant within 48 hours or at some time during lactation after pregnancy and delivery, which is called postpartum sexual cycle or abnormal pregnancy.

8. Normal body temperature is 38.6 (37.8 ~ 39.5)℃, heart rate is 280 (200 ~ 360) beats/min, respiratory rate is 90 (69 ~ 104) beats/min, and tidal volume is1.8 (/kloc-). The blood pressure was 75- 120mmHg, the total number of red blood cells was 560(4.5-7.0) million/(mm3), and hemoglobin14.4 (1~16.5) g//kl.