{"id":1978,"date":"2017-01-28T16:54:34","date_gmt":"2017-01-28T15:54:34","guid":{"rendered":"https:\/\/awecadvisors.org\/assessment-of-pain-in-sheep\/"},"modified":"2024-05-01T16:11:18","modified_gmt":"2024-05-01T15:11:18","slug":"assessment-of-pain-in-sheep","status":"publish","type":"post","link":"https:\/\/awecadvisors.org\/en\/farm-animals\/assessment-of-pain-in-sheep\/","title":{"rendered":"Assessment of pain in sheep"},"content":{"rendered":"<p><strong>X.Manteca, D.Temple, E.Mainau, P.Llonch<\/strong><\/p>\n<p><a href=\"https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_Sheet_FAWEC_n17_en.pdf\" target=\"_blank\" rel=\"noopener\">Download PDF Technical document<\/a><\/p>\n<p><a href=\"https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/doc_mes_info_FS17_en.pdf\" target=\"_blank\" rel=\"noopener\">More information<\/a><\/p>\n<p><strong>Pain is a major welfare issue and sheep may experience pain as a result of several medical conditions, hoof injuries and mastitis being the most important ones. Some husbandry practices such as tail-docking and castration, which are carried out in several countries, are also painful. Mulesing (i.e. cutting wool-bearing and wrinkled skin from the perineal region and adjoining hindquarters of sheep) is done in Australian Merino sheep to prevent flystrike, and has been shown to be painful. Painful husbandry practices will be covered in a forthcoming fact sheet dealing with treatment of pain in sheep.<\/strong><\/p>\n<p>Pain management in sheep is often inadequate and one of the reasons given by veterinarians for not administering analgesics to sheep in pain is the alleged difficulty to identify and assess pain in this species. Therefore, having valid, reliable and feasible indi\u00adcators of pain in sheep will significantly contribute to better pain treatment and may increase awareness of pain as a major welfare issue among veterinarians and producers.<\/p>\n<p>Pain can be assessed using behavioural and physiological indica\u00adtors. Physiological indicators include hyperalgesia and plasma con\u00adcentration of cortisol and acute phase proteins. Hyperalgesia is an increased pain response to a noxious stimulus and can be measured by applying a mechanical stimulus which increases gradually in pressure until the animal responds by moving. Although widely used in re\u00adsearch, physiological indicators which are measured in blood are not feasible in field conditions and will not be discussed in this fact sheet.<\/p>\n<p>Pain assessment tools rely mainly on general changes in beha\u00adviour, as they are sensitive and non-invasive indicators of pain. Re\u00adcently, changes in facial expression have been shown to be very use\u00adful. Additionally, scoring systems for mastitis and lameness (which are among the main medical conditions associated with pain) are also available to be used in sheep.<\/p>\n<h2>General changes in behaviour<\/h2>\n<p>Behavioural changes such as lip curling, trembling, vocalization and abnormal postures have been described in lambs undergoing tail-docking or castration. In general, sheep in pain may show the fo\u00adllowing signs:<\/p>\n<p>Reduced feed intake and rumination.<br \/>\nLicking, rubbing or scratching painful areas.<br \/>\nReluctance to move.<br \/>\nGrinding their teeth and curling their lips.<br \/>\nAltered social interactions.<br \/>\nChanges in posture to avoid moving or causing contact to a painful body area.<\/p>\n<h2>Facial expressions<\/h2>\n<p>Facial expression scoring systems for pain assessment have been de\u00adveloped for a variety of species including laboratory rodents, rabbits and horses. These systems have been shown to be valid and reliable indicators of pain severity in animals and moreover they require minimal time.<\/p>\n<p>More recently, a Sheep Pain Facial Expression Scale (SPFES) has been developed. SPFES has been shown to be able to identify sheep suffering pain caused by mastitis or footrot. Inter-observer reliabili\u00adty was very high and minimum training was required. The authors concluded that \u201cSPFES offers a reliable and effective method of assessing pain in sheep after minimal training\u201d.<\/p>\n<p>The SPFES includes five traits, each being scored as 0 (not pre\u00adsent), 1 (partially present) or 2 (present) (see Figures 1 and 2):<\/p>\n<ul>\n<li>Orbital tightening \u2013 there is a closing of the palpebral fissure by the eyelids and a narrowing of the eye aperture.<\/li>\n<li>Cheek tightening \u2013 there is a more convex shaping to the cheek in the area of the masseter muscle.<\/li>\n<li>Abnormal ear posture \u2013 ears become fully rotated ventrally and caudally.<\/li>\n<li>Abnormal lip and jaw profile \u2013 the jaw profile appears straight to concave.<\/li>\n<li>Abnormal nostril and philtrum shape \u2013 a \u201cV\u201d shape between nostril apertures is present.<\/li>\n<\/ul>\n<div id=\"attachment_992\" style=\"width: 2570px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-992\" class=\"wp-image-992 size-full\" src=\"https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_lateral.jpeg\" alt=\"\" width=\"2560\" height=\"1920\" srcset=\"https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_lateral.jpeg 2560w, https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_lateral-1280x960.jpeg 1280w, https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_lateral-980x735.jpeg 980w, https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_lateral-480x360.jpeg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 2560px, 100vw\" \/><p id=\"caption-attachment-992\" class=\"wp-caption-text\">Figure 1. Side view of a sheep head showing four areas used in the Sheep Facial Expression of Pain Scale: (1) eyes &#8211; degree of orbital contraction, (2) cheek &#8211; degree of contraction, (3) ears &#8211; posture, and (4) lip and jaw &#8211; profile.<\/p><\/div>\n<div id=\"attachment_995\" style=\"width: 2570px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-995\" class=\"size-full wp-image-995\" src=\"https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_frontal.jpeg\" alt=\"\" width=\"2560\" height=\"1920\" srcset=\"https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_frontal.jpeg 2560w, https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_frontal-1280x960.jpeg 1280w, https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_frontal-980x735.jpeg 980w, https:\/\/awecadvisors.org\/wp-content\/uploads\/2023\/08\/Fact_sheet_17_frontal-480x360.jpeg 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) and (max-width: 980px) 980px, (min-width: 981px) and (max-width: 1280px) 1280px, (min-width: 1281px) 2560px, 100vw\" \/><p id=\"caption-attachment-995\" class=\"wp-caption-text\">Frontal view of a sheep head showing two areas used in the Sheep Facial Expression of Pain Scale: (1) ears &#8211; posture and (2) nostril and philtrum &#8211; shape.<\/p><\/div>\n<h2><\/h2>\n<h2>Scoring lameness<\/h2>\n<p>Lameness refers to an abnormality of movement and is particularly evident when the animal is moving. Lameness is a common pro\u00adblem in sheep and most cases of lameness are caused by infections of the hoof. Lameness indicates that sheep is feeling pain and seve\u00adral studies have shown that lameness causes hyperalgesia. Lameness can be scored following a 4-point scale that takes into account the smoothness of movement, whether weight is borne equally on all four feet, presence of head bobbing, length of the stride and reluc\u00adtance to stand or move.<\/p>\n<h2>Scoring mastitis<\/h2>\n<p>Mastitis is the presence of infections in the udder of lactating ewes and causes pain and hyperalgesia. Mastitis can be assessed using a 3-point scale that takes into account the presence of lesions and lumps in the udder as well as whether redness or hardness is detec\u00adted in the udder.<\/p>\n<blockquote>\n<h3><strong><em>\u201c HAVING GOOD INDICATORS OF PAIN IN SHEEP WILL CONTRIBUTE TO BETTER PAIN TREATMENT AND WILL INCREASE AWARENESS OF PAIN AS A MAJOR WELFARE ISSUE. \u201d<\/em><\/strong><\/h3>\n<\/blockquote>\n<h2>Summary<\/h2>\n<p>Pain management in sheep is often inadequate and this is partly due to the alleged difficulty to identify pain in this species. Pain assessment tools rely mainly on behavioural changes, as they are sensitive and non-invasive indicators of pain. Changes in facial ex\u00adpression have been shown to be very useful to assess pain in sheep. Scoring systems for mastitis and lameness are also available for the use in sheep.<\/p>\n<h2>References<\/h2>\n<ul>\n<li>AWIN (2015) Welfare assessment protocol for sheep. DOI: 10.13130\/AWIN_SHEEP_2015.<br \/>\nFitzpatrick J, Scott M and Nolan A (2006) Assessment of pain and welfare in sheep Small Ruminant Research 62: 55-61.<\/li>\n<li>Langford D J, Bailey A L, Chanda M L, Clarke S E, Drummond T E, Echols S, Glick S, Ingrao J, Klassen-Ross T, Lacroix-Fralish M L, Matsumiya L, Sorge R E, Sotocinal S G, Tabaka JM, Wong D, van den Maagdenberg A M J M, Ferrari M D, Craig K D and Mogil J S (2010) Coding of facial expressions of pain in the laboratory mouse Nature Methods 7: 447\u2013479,<\/li>\n<li>McLennan K M, Rebelo C J B, Corke M J, Holmes M A, Leach M C and Constantino-Casas F (2016) Development of a facial expression scale using footrot and mastitis as models of pain in sheep Applied Animal Behaviour Science 176: 19-26.<\/li>\n<li>Molony V, Kent J E, McKendrick I J (2002). Validation of a method for assessment of an acute pain in lambs. Applied Ani\u00admal Behaviour Science 76: 215\u2013238.<\/li>\n<li>National Research Council (2009) Recognition and Allevia\u00adtion of Pain in Laboratory Animals. Washington: The National Academies Press.<\/li>\n<\/ul>\n<span class=\"et_bloom_bottom_trigger\"><\/span>","protected":false},"excerpt":{"rendered":"<p>Pain is a major welfare issue and sheep may experience pain as a result of several medical conditions, hoof injuries and mastitis being the most important ones.<\/p>\n","protected":false},"author":7,"featured_media":1979,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"categories":[131],"tags":[63],"class_list":["post-1978","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-farm-animals","tag-farm-animals"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Assessment of pain in sheep | AWEC<\/title>\n<meta name=\"description\" content=\"Pain management in sheep is often inadequate and this is partly due to the alleged difficulty to identify pain in this species. 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