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How do sheep get urinary stones?
Release time:
2019-09-04
Urinary calculi refers to the formation or retention of calcium carbonate, phosphate-based salt crystals in the renal pelvis, ureter and urethra, which makes sheep dysuria and causes inflammation of the urinary tract caused by stones. Urethral calculi are common in the disease, while renal pelvis calculi and bladder calculi are rare.
Now many people reactSheep in captivity have more lithiasis, and fattened sheep have more. This problem is a big problem encountered in the feeding process.
Urinary calculi refers to the formation or retention of calcium carbonate, phosphate-based salt crystals in the renal pelvis, ureter and urethra, which makes sheep dysuria and causes inflammation of the urinary tract caused by stones. Urethral calculi are common in the disease, while renal pelvis calculi and bladder calculi are rare.
Rams and steers and house-fed fattening lambs are prone to occur, and ewes are less likely to occur.
urinary calculiThere are three main types: phosphate stones, calcium stones, and silicate stones.
Main pathogenic factors of urinary calculi in sheep
The ratio of calcium and phosphorus in the diet is out of balance. In general, the ratio of calcium to phosphorus should be maintained at 2:1, at least not less than 1:1.
Feeding factors are the most important factors leading to urinary stones. If our diet belongs to the partial concentrate type diet, then what will happen? We know that the grain contains abnormal calcium, phosphorus ratio, 1:4 to 1:6, so the diet grain ratio is high, it will lead to a large amount of phosphorus into the urine.
This is first of all because too much phosphorus enters the sheep's body. More importantly, the saliva of ruminants is rich in phosphorus. When we feed the partial concentrate type diet, because the concentrate can not promote a large number of saliva secretion (roughage can promote a large number of saliva secretion, so that more phosphorus in the body with saliva into the digestive tract with feces excreted in vitro).
Phosphorus that is not secreted with saliva is excreted only in the urine, resulting in the production of urinary phosphate stones.
Phosphorus-rich Rocky Lick BrickAlso known as"Progestational Rocky", which is specially designed and produced for breeding livestock, especially during pregnancy, phosphorus, calcium, zinc, magnesium, iron, cobalt, iodine, manganese, selenium, sodium and other mineral trace elements interact with each other. it plays a very important role in improving the health index, reproduction rate and milk yield of ewes, and prevents urinary stones.
Sheep grazing on lush-growing clover pastures are prone to calcium carbonate and calcium oxalate urinary stones because this grass contains higher calcium, but lower phosphorus, and higher oxalic acid.The combination of oxalic acid and calcium produces calcium that is not easily absorbed and makes the urine alkaline, leading to the development of calcium stones.In North America, goats that feed mainly on alfalfa have also been found to have urinary calculi. Calcium oxalate stones are also formed in the upper part of a large intake of sugar beet.
Mucin is the matrix (precursor) of stone formation. Dietary estrogenic substances or growth promoters (diethylstilbestrol or legumes containing estrogenic components) increase the concentration of mucin in the urine, which leads to the formation of stones.
Pellet feed also increases the concentration of mucin in the urine.Too much protein beyond what is needed for maintenance and growth can cause fattening lambs to form stones.
Mucopolysaccharides are associated with the rapid growth of the body and usually also with the formation of stones. When fed certain feeds, such as cottonseed cake, West African sorghum, will lead to an increase in mucopolysaccharides.
Vitamin A deficiency causes the epithelial cells of the bladder to fall off, which acts as the matrix (or precursor) of the stone and eventually forms the stone.
Huang Rockyis specially designed for sheep, it contains a balanced and rich traceelement, the cobalt element in this product produces vitamins for the sheep's bodyB12Very important, selenium, zinc, magnesium, iron, cobalt, iodine, manganese, sodium and other elements interact to promote rumination and metabolism, improve sheep's appetite, poor development, low milk yield and weight loss and other symptoms.
When the amount of drinking water is insufficient, the concentration of urine increases, and the mineral content of urine is in a super-saturated state (dehydration is a key factor in the development of various stones), which is a risk factor for the occurrence of urinary stones.
Due to the length and diameter of the urethra, urinary stones are more likely to occur in the ram. Castration at early age leads to a deficiency of the relevant sex hormones, which affects the development of the penis and urethra. Early castrated sheep are prone to stone obstruction due to their small urethral diameter.
If the feeding method is not free, but 1-2 times a day, this will cause the release of antidiuretic hormone after feeding, so that the excretion of urine is temporarily reduced, thereby increasing the concentration of urine, there is the risk of stone formation.
Heredity may also have an impact on the occurrence of stones.Some sheep breeds (Texel) prefer to increase the excretion of phosphorus in the urine.Urinary stones may also occur in individuals with a predisposed condition.
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