Urban Foxes in London Garden: Fencing Best, Ultrasonics Ineffective

London, UK: foxes (mother + cubs) in fenced garden (40 ft). No food, clean, mowed lawn. Ads for sonic repellents and urine sprays. Wants effective removal.

Evidence-Based Assessment

• Ultrasonics don't work—no peer-reviewed support; most mammals can't hear ultrasound
• Fox urine attracts foxes (used as lure in US); coyote urine might deter but UK foxes don't know coyotes

Recommended: Harassment

Backfill den, flood, make area unpleasant. Check UK humane laws—animal rights activism strong.

Follow-Up: Smell, Grass Damage, Baby Safety

Fox urine kills grass. Disease risk real but often overstated. ICWDM disease info.

Definitive Solution

Fox-proof fence: Buried 6", 2m high, 1ft outward overhang to prevent climbing.

Tolerance Option

Foxes cause minimal damage. Consider coexistence if risks acceptable.