Hens typically begin laying eggs after being raised for about 4.5 months. However, their egg production rate starts to drop after more than a year and eventually declines completely. In Singapore, experts have conducted long-term experiments and found that using an artificial method can extend the hens' reproductive period significantly. This method allows hens to experience a second puberty, extending their egg-laying cycle from over one year to more than four years.
The process involves stopping feed and water supply when the hens’ laying rate begins to decrease. This makes them uncomfortable due to hunger and thirst. After three days, small amounts of water are given in the morning and afternoon for one hour each time. On the fifth day, they are fed 5 grams of feed, increasing by 5 grams daily afterward. At the same time, the lights in the shed are turned off at night. After this treatment, the hens molt and grow new feathers. By the 20th day, they enter a second puberty, and their egg production returns to its original level.
In Japan, some chicken farms have discovered that feeding fresh celery to hens can boost their egg production by 15% to 20%. The method is simple: feed celery three times a week, with about 50 grams per session. This includes both the leaves and chopped stems mixed into their regular feed. Additionally, 1 kilogram of celery is boiled in 1.7 kilograms of water for about 15 minutes before being given to the hens. This natural supplement not only improves egg production but also enhances the overall health of the flock.
Disposable surgical instruments are single-use medical devices that are used during surgery and discarded after use. Some examples of disposable surgical instruments include:
1. Scalpel: A surgical knife used for making incisions in the patient's skin or tissues. 2. Forceps: A tool used for grasping and holding tissues or organs during surgery. 3. Retractors: Surgical instruments used to hold open incisions or wounds to provide better visibility for the surgeon. 4. Scissors: Used for cutting tissues and sutures during surgery. 5. Hemostats: Used to clamp blood vessels and prevent bleeding during surgery. 6. Suction devices: Used to remove fluids or debris from the surgical site. 7. Needles: Used to suture or stitch wounds. 8. Electrocautery: A tool that uses an electrical current to cut or coagulate tissues during surgery. 9. Endoscopes: Used for minimally invasive surgeries, these instruments allow the surgeon to see inside the body without making large incisions.
10. Laparoscopic instruments: Used for minimally invasive surgeries, these instruments include a camera and specialized tools for performing surgery through small incisions.