Clinical Assessment, Diagnosis, and Differential Diagnosis
Key Concepts
- Behavioral history: Comprehensive interview covering onset, frequency, intensity, duration, context, and owner response.
- Medical rule-outs: Pain, neurological, endocrine (thyroid, adrenal), sensory deficits, and metabolic disorders can cause behavioral changes.
- Diagnostic criteria: Use standardized systems (e.g., DSM-5 for humans, but adapted for animals; often use syndromic classification).
- Differential diagnosis: Distinguish between similar presentations (e.g., separation anxiety vs. boredom vs. noise phobia).
- Assessment tools: Questionnaires (e.g., C-BARQ), video analysis, behavioral tests.
- Comorbidities: Multiple behavior problems often coexist.
Traps
- Failing to perform medical workup before diagnosing a behavior disorder.
- Misdiagnosing separation anxiety when the problem is actually noise phobia or incomplete house training.
- Overlooking owner-reported vs. observed behavior discrepancies.
- Assuming a single diagnosis when comorbidity is common.
- Ignoring cultural and environmental factors.
Worked Example
A dog vocalizes and destroys doors when left alone. Differential: separation anxiety (distress only when alone), noise phobia (during storms), confinement anxiety (only when crated), or incomplete training. Rule of thumb: obtain video when alone to confirm distress; rule out medical causes (e.g., pain, cognitive dysfunction).