This study was conducted to investigate the potential of toy provision for stress reduction, welfare improvement and toy preference in finishing pigs. Toy shape was expected to exert effects on stress related behaviors including fighting, bothering, and feed competition. Three different toy shapes (i.e. square, round, and oval) were given to groups of finishing pigs. A no toy control group was also included. The duration and frequency of abnormal behaviors and use time for toy preference were compared among groups. The duration and frequency of stress related behaviors was higher (p<0.01) among the non-toy-using finishing pigs on 20 minutes and 118 times than 16 minutes and 57 times of toy-using finishing pigs. Toy shape exerted no significant effects, however, toy use displayed a clear ability to reduce stress related behaviors among finishing pigs. Toy use time and shape both displayed no clear effect on the duration of stress related behaviors. These behaviors were most frequently displayed in the afternoons when the finishing pigs become most active, and were not affected by toy shape. Overall, the square shaped toy was used much longer (9.7 hours) and more frequently (566 times) in a 24 hour period by the finishing pigs (p<0.01). In conclusion, providing toys to finishing pigs reduces stress and stress related behaviors. This finding is expected to positively impact welfare and improve finishing pig productivity. Square shaped toys were most preferred by the finishing pigs, therefore adopting toys with square features is recommended.

ABSTRACT
Ⅰ. 서론
Ⅱ. 재료 및 방법
    1. 시험개요
    2. 행동조사
    3. 행동분석
    4. 통계분석
Ⅲ. 결과 및 고찰
    1. 장난감과 이상행동 발현
    2. 장난감 모양과 사용
Ⅳ. 요약
Ⅴ. 참고문헌

• 김두환(경상국립대학교 축산과학부, 농식품바이오융복합연구원 교수) | Doo-Hwan Kim (Professor,Division of Animal Science, Agri-Food Bio Convergence Institute, Gyeongsang National University, Jinju 52725, Korea) Corresponding author
• 하덕민(경상국립대학교 축산과학부, 농식품바이오융복합연구원 연구원) | Duck-Min Ha (Researcher,Division of Animal Science, Agri-Food Bio Convergence Institute, Gyeongsang National University, Jinju 52725, Korea)
• 한정철(경상국립대학교 축산과학부, 농식품바이오융복합연구원 연구원) | Jeong-Cheol Han (Researcher, Division of Animal Science, Agri-Food Bio Convergence Institute, Gyeongsang National University, Jinju 52725, Korea)
• 박태환(경상국립대학교 축산과학부, 농식품바이오융복합연구원 대학원생) | Tae-Hwan Park (Graduate Student, Division of Animal Science, Agri-Food Bio Convergence Institute, Gyeongsang National University, Jinju 52725, Korea)