The Pros And Cons Of Animal Welfare

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Animal welfare assessment has been based on the five freedoms1 concept. This considered negative aspects of mental state (fear and stress) and the compromise of physical domains (nutrition, environment, health, behavior), but did not take into account any positive states [1]. Positive welfare has been gaining importance in science [2,3,4] and among public opinion in the past years [5]. As a result, the five freedoms definition started to change and included positive experiences or emotions such as satiety, vitality, reward, contentment, curiosity and playfulness as part of animal welfare [1].
As public concern about animal welfare has increased in the last few years [5,6,7,8], NGOs in USA have started to increase their interest in the inclusion …show more content…

well fed, safe and healthy)’.
The last criterion might be the reason why NGOs are interested in promoting play behavior as an indicator of positive welfare. Play behavior is more likely to be expressed when animals are healthy and well-fed, and less likely when they are subjected to stressful conditions [9,10]. For instance, play behavior is observed less in malnourished piglets [11,12] and also in bad weather conditions [13]. Play behavior may indicate a state of good welfare, because once the primary needs of the animals are satisfied, the motivation for playing might be higher.
In order to state that play behavior is a good indicator of positive animal welfare the relationship between both has to be robust, behavior assessment has to be practically feasible and wider societal reasons for using play behavior to indicate and promote positive welfare have to be compelling. These criteria are discussed in the following paragraphs and scored in Table …show more content…

It is practically feasible to introduce the scoring of play behavior into welfare assessment schemes.
It is clear that the introduction of play behavior into animal welfare assessment schemes is practically feasible only if play markers are known and are easy to be differentiated from other type of behavior, if type and frequency of play behavior is equal among different production stages, and if play behavior assessment is easy to be learnt by inexperienced observers and is a reliable method. This statements and the given scores (Table 1) are discussed briefly in terms of pig behavior in the following paragraphs.
The main play markers in pigs are hop, scamper, pivot, toss head, shake object and carry object as described by Newberry et al. [13], and it extends across all play behaviour categories, namely locomotor, social and object behavior [12,13]. However play behavior and markers are relatively easy to be recognized [14], sometimes it might be difficult to tell the difference between to play behavior, such as playful and mild fight [13].
Play behavior is more frequent and more likely to be observed in piglets between two and six weeks old and then it starts to decline [12,13]. Hence, play might be less present in

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