ANSC 3306 Intro/ Lecture

Understanding Manifestation in Animals

  • Definition of Manifestation: The process in which animals portray their state of being, particularly relating to pain or discomfort.

  • Importance of Observation: Animals cannot communicate like humans, thus their behavior must be carefully observed to ascertain health or pain conditions.

Pain Assessment in Animals

  • Understanding Normal Behavior:

    • To identify abnormal behaviors, it is crucial to first understand the normal behavior of a species.

    • Abnormal signs are often obvious once normalcy is established.

Indicators of Pain

  • Clinical Signs and Features:

    • Body Condition Score (BCS):

    • Important for assessing animal health; includes evaluations to determine if an animal is too fat, too skinny, or at an ideal weight.

    • Thermometer Usage:

    • Importance of checking rectal temperature to assess ailments; highlights the correlation between body temperature and general health.

  • Behavioral Responses:

    • A straight back indicates comfort in nonhuman animals; an arched back often denotes pain.

    • Understanding lameness: Animals not putting weight on a painful limb often shows quick movements of the opposite limb and other signs such as head bobbing or tail movement.

Physiological Responses to Pain

  • Functions of Pain Responses:

    • Warn of imminent danger, predict further occurrences, and signal to conspecifics about potential threats or pain.

    • Concept of negative feedback: The body's instinctive response to stop harmful stimuli, demonstrated through reflex actions (e.g., patella reflex).

Physiological Signs of Pain and Distress

  • Elevated Heart Rate:

    • Normal resting heart rate for horses is 40 beats per minute.

    • A resting heart rate of 60-80 signifies tachycardia and potential pain in horses.

  • Respiratory Rate:

    • Elevated respiratory rates indicate distress; cats should not pant; if they do, it may indicate serious issues (e.g., pus in the chest).

    • Cattle should not use belly movements for breathing, indicating pain.

Other Clinical Signs

  • Blood Pressure:

    • Typically not measured in clinical routines due to practical constraints, yet it can signal health issues when other symptoms (e.g., red eyes) are present.

  • Physical Indicators:

    • Digital Pulses: Thickening or bounding pulses can indicate pain, such as foot abscesses in horses.

    • Pupil Dilation: Indicates pain or fear; large pupils allow more