Historically, veterinary science focused on pathophysiology, while animal behavior was relegated to ethology or production efficiency. Over the past two decades, a paradigm shift has occurred: behavior is now recognized as the sixth vital sign (alongside temperature, pulse, respiration, pain, and nutrition). This review evaluates evidence from 2015–2025, emphasizing companion animals, livestock, and zoo species.
| Observed Behavior | Incorrect Assumption | Likely Medical Cause | |------------------|----------------------|----------------------| | Cat urinating outside litter box | “Spite” | Lower urinary tract disease, cystitis, kidney disease | | Dog eating feces | “Bad habit” | Exocrine pancreatic insufficiency, malabsorption, starvation | | Sudden aggression in old dog | “Mean personality” | Pain (arthritis, dental), brain tumor, sensory decline | | Feather plucking in parrot | “Boredom” | Heavy metal toxicity, skin infection, psittacine beak and feather disease | zooskool c700 dog show ayumi thattyavi 2 39link39 repack
Conclusion: Never treat a behavior problem without a thorough medical workup. | Observed Behavior | Incorrect Assumption | Likely
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