Behavioural Effects of the Shelter Design on Male Guinea Pigs

Abstract

To improve the welfare of group-housed male guinea pigs during the acclimatization period, which is when  social groups are formed, different designs of shelters were tested, one shelter having one entrance to a single  compartment – a Box for group hiding – and the other having individual entrances to a compartment  in the cage – a Garage for single hiding. Both were studied to evaluate whether they had any affect on the  behavioral levels. Behavioural and weight data were collected during five of the seven days of the acclimatization  period. Data were tested against the Mann-Whitney U and Variance Analysis test. Results demonstrated  that males in cages with the garage spent more time inside the shelter (P =0.0004), while males in  cages with the box spent more time resting (P =0.000), feeding (P =0.0043) and drinking (P =0.0022) on  the open floor, and yet there was no difference in individual weight between treatments at the end of the  study. Males in cages with garage experienced a more rapid establishment of the social hierarchy (P =  0.0024) by being involved with a lower number of social interactions. The conclusion from the present  study is considered to show that males in cages with the garage were able to avoid unnecessarily high levels  of stress and aggression caused by territorial defence while the hierarchy was established.