Animal shelters house millions of dogs in conditions that cause significant acute and chronic stress, with welfare outcomes highly dependent on enrichment programs, length of stay, and behavioral support.
The shelter environment — loud, unpredictable, isolating, and barren — is acutely stressful for dogs evolved for human companionship and social activity. Kennel stress syndrome encompasses behavioral deterioration including hyperactivity, barrier frustration, repetitive spinning, and social withdrawal that worsens with duration of stay. Many dogs that arrived behaviorally healthy develop behavioral problems during extended shelter stays that reduce adoptability — creating a welfare and management cycle that disadvantages the most vulnerable dogs. Foster care represents the most effective welfare intervention: dogs in foster homes show dramatically normalized behavior and improved health outcomes. Under-resourced shelters struggle to provide the enrichment and behavioral support that would transform outcomes for the dogs in their care.