How about a Week. I guess one week is enough.. I see somewhere but i can't find that article to past link for you. see any animal related study. some have mentioned that.
There is a recent study based on stress biomarker and metabolites(
IgA and Corticosterone Metabolites). They suggested 4 weeks for compelet acclimatization in mice.
Reference :
Bundgaard CJ, Kalliokoski O, Abelson KS, Hau J. Acclimatization of mice to different cage types and social groupings with respect to fecal secretion of IgA and corticosterone metabolites. in vivo. 2012 Nov 1;26(6):883-8.
Dear Abir, at least one week of acclimatization is always recommended. You can find further information in d'Isa, Brambilla and Fasano, 2014. Citing from the paper:
"If animals are obtained from a commercial source, another
research institute or an internal breeding facility that is sepa-
rated from the animal behavior testing structure, then ensure a
period of at least 1 week for acclimatization and recovery from
shipment and transportation stress. This kind of stress generates
a variety of effects on animal physiology (including changes in
cardiovascular, immune, endocrine, central nervous, and repro-
ductive systems) and behavior [95–101]. With some genetic
strains a longer period can be required. BALB/c mice, for
instance, have been shown to have high glucocorticoid levels, a
common index of hypothalamus–pituitary–adrenal (HPA) axis
activation, even 15 days after shipment [102]. An insufficient
acclimatization period does not only put at risk animal welfare
but also represents a confounding factor which can alter the
outcome of the experiments, menacing result reliability".
From:
Behavioral Methods for the Study of the Ras–ERK Pathway in Memory Formation and Consolidation: Passive Avoidance and Novel Object Recognition Tests. Available at: https://www.researchgate.net/publication/259956779_Behavioral_Methods_for_the_Study_of_the_Ras-ERK_Pathway_in_Memory_Formation_and_Consolidation_Passive_Avoidance_and_Novel_Object_Recognition_Tests.
