ABSTRACT Vocalization and behavior are non-invasive methods of animal welfare analysis. The objective of this study was to evaluate the welfare of piglets during Australian ear notching, tooth wear and castration, from vocalizations and behavioral aspects of pigs. For this, 281 piglets were used, with measurements of the maximum and minimum intensity of the noise emitted by the piglets and the time of accomplishment. The behavior of the piglets was obtained according to the activity performed during handling and containment. For behavioral analysis a specific etogram was used. The comparison of means was performed by T-test and PDIFF. The castration was the practice with the highest average of time of accomplishment, followed by the wear of teeth and ear notching. The highest mean values of minimum and maximum intensity were found for male castration in the slow process. It was observed that sex did not influence the time when the ear notching and tooth wear were performed, but at the same time the avoidance behavior was the most observed (P <0.05), with low frequency in castration. Therefore, it can be concluded that the procedures caused pain, characterized by vocal demonstrations and negative behavior.

RESUMO Vocalização e comportamento são métodos não invasivos de análise de bem-estar animal. O objetivo deste estudo foi avaliar o bem-estar de leitões durante as práticas de mossa australiana, desgaste de dentes e castração, a partir de vocalizações e aspectos comportamentais dos suínos. Para tal, foram utilizados 281 leitões, com aferições da intensidade máxima e mínima do ruído emitido pelos leitões e o tempo de realização. O comportamento dos leitões foi obtido de acordo com a atividade desempenhada durante o manejo e contenção. Para análise comportamental um etograma específico foi utilizado. A comparação de médias foi realizada pelo teste-T e PDIFF. A castração foi a prática com maior média de tempo de realização, seguida pelo desgaste de dentes e mossa. Os maiores valores de média de intensidade mínima e máxima foram encontrados para a castração de machos, no processo lento. Observou-se que o sexo não influenciou no tempo em que a mossa e o desgaste de dentes foram realizados, mas durante os mesmos o comportamento de esquiva foi o mais observado (P<0,05), com baixa frequência na castração. Portanto, pode-se concluir que os procedimentos ocasionaram dor, caracterizada por demonstrações vocais e de comportamento negativo.

ABSTRACT The objective of this study was to evaluate the effect of the presence of roosters on welfare and egg production of laying hens reared in an alternative system. Two breeding systems were established: barn 1 - laying hens reared without roosters (4500 birds); and barn 2 - laying hens reared with roosters (4500 layers and 250 roosters). In the poultry facilities, microclimate, egg production, mortality rate, and bird behavior were evaluated. Microclimate analysis showed that the birds were subjected to periods of constant heat stress, except for the morning hours. However, even under these conditions, egg production results and mortality rate were consistent with the indices recommended in the Isa Brown management guide in the barn with roosters; the indices obtained were even better and were characterized by higher egg production and lower mortality rates. In addition to productivity benefits, the presence of roosters broadened the behavioral repertoire of the birds due to the introduction of reproductive behaviors. Moreover, there was a significant decrease in the tolerance-reflex behavior, which is associated with the impossibility of displaying reproductive behaviors. This alternative egg production system proved to promote animal welfare since it provides and stimulates the display of behaviors considered important for birds.