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Canadian pig farming method: Sugar reduces piglet pain!

hit count: Updated: 19/12/01 09:13:12 Source: woiego.com [ close ] share:

    ?加拿大的大草原猪中心(PSC)对此进行了研究,结果令人惊喜。 As we all know, humans can overcome the bad feeling brought by taking a little sugar when taking medicine. Can sugar reduce the pain of piglets during castration and tail cutting ? Canadian Prairie Pig Center (PSC) has studied this And the results are surprising. From the perspective of animal welfare and painless operation, for piglet operations such as castration and tail cutting, pain control is the focus of the current global pig industry. With the development, those routinely causing pain to piglets will not be accepted, and legislation, industry regulations and other bans will gradually be passed.

    PSC的研究者们探讨了糖在控制仔猪阉割过程疼痛的作用。 Therefore, PSC researchers explores the sugar in control piglet castration process pain. The design concept for this study stems from the long-term use of sugar in human neonatal heel pricks, vaccines, blood sampling and circumcision to reduce pain.

    Pain problems in the piglet production process

    The pig industry around the world will take a series of painful operations on piglets, such as castration, tail cutting, teeth cutting, and ear piercing. With the exception of the European Union, no other country has adopted pain control measures. The pain of these operations on piglets will last for several days.

    There is good evidence that castration is a very painful process. The scrotum and testis of pigs are full of nerves. During castration, the piglets exhibit pain both physiologically and behaviorally. Tests have shown that piglets undergoing these operations show more frequent humming and tail shaking.

    Piglets that have undergone castration take longer to recover, and sows show more pain. Castration also significantly increased the levels of cortisol and other stress hormones in piglets' blood.

    Similarly, tail treatment also increased cortisol levels in piglets' blood. These facts indicate that these operations on piglets caused great pain and stress to the piglets.

    For this reason, these operations in piglet production have been subject to much criticism. 2016年7月新出版的猪的实践护理及处理(Practice for the Care and Handling of Pigs)一书中,加拿大将要求在这些流程中使用镇痛剂。 In a new book, Practice for the Care and Handling of Pigs, to be published in July 2016, Canada will require the use of analgesics in these processes. The European Union also advocates the abolition of piglet castration in 2018 and is currently promoting the use of analgesics. The United States currently requires painless treatment and use of non-analgesics. In fact, there are currently no better alternatives for some operations, such as tail breaking. Therefore, the pig industry needs to find more effective pain control methods to reduce the pain of piglets.

    Traditional piglet pain method

    At present, the management method for controlling pain in piglets is usually general or local anesthesia, and the commonly used drug is lidocaine. (NSAIDs)美洛昔康、酮基布洛芬。 After harmful operations, commonly used analgesics are non-steroidal anti-inflammatory drugs (NSAIDs) meloxicam and ketoprofen. This kind of medicine does not take effect until 20 minutes after injection. Therefore, if you want more immediate relief from piglet pain, these drugs should be injected before treatment. This requires two operations on piglets, increased work intensity and piglet stress.

    Recent studies have shown that treatment time is significantly positively related to stress levels. In addition, the cost and labor investment in anesthesia and analgesia are also large.

    Sucrose: relieve pain

    Sucrose has been shown to reduce pain in humans and rodents, and it may also affect piglets. Before giving mice pain treatment, oral administration of a certain amount of sugar can reduce the pain response of rats and lower their blood corticosterone levels. Sucrose is cheap and has a wide range of sources, so it can be considered for use.

    Although the specific mechanism of action of sugar is unknown, it is generally believed that sugar can quickly affect taste receptors, thereby activating the release of endogenous opioid peptides. Therefore, compared to other pain-reducing treatments, sugar treatment methods are less expensive and less stressful.

       PSC studied the effect of oral administration of a certain dose of sucrose on piglets after castration. The test is divided into 5 treatments:

       1. Control group: castration without pain management

       2. Oral sucrose before castration

       3. Oral sucrose after castration

       4. Pretend oral sugar after castration: demonstrate oral sugar after castration

       5. Pretend castration: only demonstrate the castration process

    Test evaluation index:

    Count the time it takes for piglets to pass through a specific guide slot. The specific guide slot contains two ten-centimeter-high obstacles placed behind the delivery fence. The trial will record the time for the piglets to return to the farrowing pen through the guide trough. Previous experiments have shown that it takes longer for piglets to pass through the guide trough after undergoing painful procedures.

    Faster transit time

    Piglets in the sucrose group showed faster transit times compared to the group without pain treatment. In the sucrose treatment group and the pretend castration group, the behavior and time of the piglets passing through the treatment tank were similar. As in the previous trial results, piglets without pain management showed greater response and longer transit times.

    Compared with the pretend castration treatment group, the castration treatment significantly increased blood cortisol levels in piglets, suggesting that the castration treatment was intensely painful. However, blood cortisol levels in piglets in the oral sucrose group were similar to those in the group without castration.

    These results indicate that oral sucrose reduces the behavioral response of piglets to harmful treatments, but has no significant effect on physiological responses to stress. Each treatment had no effect on the behavioral response of the piglets in the farrowing pen. 明仔猪在分娩栏内的行为多变性,不适合用来衡量疼痛反应。 This also indicates that piglets' behavioral variability in the farrowing pen is not suitable for measuring pain response. The specific treatment tank in this test provides a more direct, objective, and reliable method for measuring piglet pain response.

    to sum up

    The above results indicate that it is not clear whether sucrose can effectively control the pain caused by castration. Because the experimental data only show that sucrose has an effective effect on behavior, it has no effect on the physiological response. 的生理指标,如 P物质,其仅对疼痛有反应而对应激无反应,可能更有效。 It may be more effective to evaluate other physiological indicators, such as substance P, which only respond to pain but not to stress. Increasing the dose of sucrose may be more effective, or the use of sucrose may reduce the amount of analgesics used.

    In short, sugar can reduce the pain response during and after harmful treatment, but further research is needed on its mechanism of action, best use method, and best use effect.

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