In this paper, we researched the effects of early post-natal stress in mother-offspring separation on the anxious and olfactory behavior on the one hand and its impact on the blood sugar level of male rats that became adults on the other. The young rats in (SS) batch underwent a three-hour (03) daily separation from their mother from 09:00 am to 12:00 as of the 03rd to 14th post-natal day (n=8). Another batch (T) which did not undergo experience any kind of stress (n=8) was part of our study as well. The behavioral study was carried out using the Elevated Plus Maze at day 71 together with the olfactory test of nest recognition at day 73. At day 76, a decapitation was achieved, the collected blood served for the study of the blood sugar level. The results show that the three-hour mother separation post-natal stress at male rats becoming adults have led to intensified anxious behavior, an alteration of the olfactory function as well as a hyperglycemia in stressed rats becoming adults.