Massachusetts Wildlife Rehabilitator Practice Exam - Prep, Practice Test & Study Guide

When dealing with a cold and lethargic Eastern chipmunk, the appropriate first action is to warm the chipmunk up slowly to a normal body temperature. This approach is crucial because a cold animal can experience significant physiological stress, and sudden warming could lead to shock or other complications, such as rewarming shock.

By warming the animal gradually, you allow its body to acclimate to the rising temperature, which can help stabilize its system and promote a more natural reactivation of metabolic functions. This measured approach also prevents rapid changes in body temperature that can be harmful, given the chipmunk's currently compromised state.

Furthermore, feeding the chipmunk or administering any warm formula before adequately warming it could lead to further complications, including gastrointestinal distress, as its body may not be ready to process food effectively. In this context, prioritizing a slow and steady warming process is essential for the animal's health and recovery.