Sensory systems and nipple attachment behavior in neonatal pigs

Area of Science:

• Animal Behavior
• Sensory Physiology
• Animal Husbandry

Background:

• Nipple attachment in piglets is crucial for early nutrition and survival.
• The role of sow odors and piglet sensory perception in this process requires further elucidation.

Purpose of the Study:

• To investigate the influence of piglet sensory systems on nipple attachment.
• To determine the role of sow ventrum odors in facilitating piglet nipple attachment.

Main Methods:

• Experiment 1: Piglets received treatments affecting olfactory system (mechanical blockage, lidocaine flush, saline flush) or served as controls; sow ventrum was washed or unwashed.
• Experiment 2 & 3: Piglets received lidocaine treatments targeting olfactory system, nose, tongue, or combinations; controls were used.
• Nipple attachment latency was recorded for all treatments.

Main Results:

• Piglet treatments affecting olfaction (blockage, lidocaine flush) significantly increased nipple attachment time.
• Washing the sow's ventrum also increased attachment latency across all piglet treatments.
• Lidocaine applied to the nose or tongue showed intermediate effects on attachment latency.

Conclusions:

• Piglet olfaction, gustation, and tactile senses are critical for efficient nipple attachment.
• Odors from the sow's ventrum play a significant role in guiding piglets to the nipple.
• Sensory input modulation impacts early-stage piglet feeding behavior.