“…While it is likely that hormonal indicators of heightened stress, such as serum corticosterone levels, return to baseline in 24 h or less after transportation in rodents and rabbits (Tuli et al, 1995;Liste et al, 2009), and other physiologic parameters, such as heart rate, mean arterial pressure, and food and water consumption return to baseline levels within several days (Toth and January, 1990;Capdevila et al, 2006), other indices, such as activity levels, behavior, or reproduction may take a week or longer to stabilize after transportation (Tuli et al, 1995;Stemkins-Sevens et al, 2009). Pair housing of guinea pigs upon arrival and provision of an in-cage shelter to paired animals has been found to increase the acclimation rate of guinea pigs following transportation (Walters et al, 2012). Pair housing of guinea pigs upon arrival and provision of an in-cage shelter to paired animals has been found to increase the acclimation rate of guinea pigs following transportation (Walters et al, 2012).…”