Exploring Scavenging Strategies and Cognitive Problem-Solving in Indian Free-Ranging Dogs

TL;DR

This study investigates how Indian free-ranging dogs employ flexible, hierarchical strategies and cognitive mechanisms to adapt their scavenging behavior when faced with unpalatable or harmful food sources in urban environments.

Contribution

It reveals the context-dependent, multi-pronged foraging strategies and cognitive flexibility of free-ranging dogs in human-dominated habitats, a previously underexplored area.

Findings

Dogs manipulate less palatable food to maximize intake.

They typically avoid the most unpalatable food.

Behavioral flexibility supports their survival in urban areas.

Abstract

Animals employ strategic decision-making while carefully weighing nutritional benefits against the risks presented by aversive or harmful stimuli in their natural environment, to maximize foraging efficiency, In India, free-ranging dogs subsist predominantly on human-generated waste, where they often encounter food contaminated with unpalatable or noxious substances such as lemon juice while scavenging. The strategies these dogs use to navigate such challenges remain poorly understood, yet are critical for understanding their ecological adaptability and survival in human-dominated environments. A total of 156 randomly encountered free-ranging adult dogs were tested across 15 sites in Nadia district, West Bengal. Each individual was exposed to a single food source containing chicken placed in either lemon juice, diluted lemon solution, or water. All trials were video-recorded, and the behavioural sequences of the dogs, including sniffing, licking, eating, and food manipulation were coded and analysed to quantify strategic foraging responses under unpalatable conditions. They were found to use a flexible, multi-pronged strategy to manipulate the comparatively less palatable food option, and typically avoid the most unpalatable one, to maximize their acquiring options. Overall, this study revealed a hierarchically structured and context-dependent foraging strategy of free-ranging dogs, propelled by sensory evaluation, risk-reward balancing, and behavioural flexibility. These findings demonstrated how urban scavengers dynamically adapt to aversive conditions while scavenging, underscoring the cognitive mechanisms that support their survival in human-dominated environments.