Prevention of fatal cage-layer osteoporosis
1Animal Science Department, University of California, Davis, CA 95616, USA.
Abstract:
Regular necropsy of samples of laying hen mortality at a large cage-layer ranch revealed significant loses due to osteoporosis. The feeding program consisted of feeding a pullet-growing diet until egg production commenced followed by a change to a laying diet. Literature review and experimental results have demonstrated a requirement for 2% dietary calcium for about 2 wk before first egg is anticipated followed by transfer to a higher calcium level during lay. A nutritional regimen of this design was tested on two paired sister flocks of hens. Necropsy of mortality during the tests showed a striking reduction in mortality due to osteoporosis.
Related Concept Videos
01:29Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
01:31Essential Minerals for Bone Health
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
01:25Role of Vitamins in Maintaining Bone Health
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
01:31Osteoclasts in Bone Remodeling
01:17Hormones and Bone Tissue
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
01:27Urinary Tract Calculi IV: Nutrition Therapy and Prevention