We have to study toxicity profile in rat pups. Please anyone can suggest me suitable method for toxicity study in rat pups by oral route of administration?
Your type of study will highly depend on route of exposure (oral/inhalation ..), target organ and onset of the exposure (neonatal or closer to weaning). No "standard" protocols are available and study design has to be adapted case-by-case. If you can give more information, that would be helpful. In case that is confidential, I can propose you sending me a private message and I can try to help with suggestions (it is my daily job). Hope that helps
The OECD Guidelines for The testing of Chemicals (Section 4: Health Effects) may be worth viewing. I am not sure of the specific endpoint you are studying but if your interest in is endocrine disruptors, the OECD has made some progress in this area. http://www.oecd.org/env/ehs/testing/oecdworkrelatedtoendocrinedisrupters.htm
In general you can refer to the repeated dose toxicity guidelines (ICH, OECD407). In case of specific endpoints, immune system or learning/memory tests may be included.