Episode 3 - Bonus Episode! Deep Dive into Head Tilt

1.The GP hook

The door bursts open; the spaniel’s listing, the owner’s in tears and someone whispers, “It’s a stroke.” Here’s the calmer, quicker way through head tilt and loss of balance—what to check, what to say and when to worry.

The door bursts open; the spaniel’s listing, the owner’s in tears and someone whispers “it’s a stroke.” Take a breath. Most head‑tilt cases you’ll see in practice are vestibular—and a calm, quick pattern check plus a five‑minute neuro screen will get you to a sensible first plan and an owner script you can stand behind.

2.First minute: calm, triage, one‑line script

Admit briefly to buy calm time if you can’t examine properly in the consulting room.

• Is it an emergency? Rarely. True emergencies are continuous rolling, relentless seizures, or a patient so nauseous/distressed you can’t examine safely. These need stabilisation (sedation, admission) before a full neuro work‑up.
• If not an emergency: calm the owner and the patient. Owners think the worst—acknowledge how dramatic it looks and set expectations: many peripheral/idiopathic cases improve markedly over 24–48 hours.
• Simple opening line: “This looks alarming but often fits a peripheral vestibular pattern. Let me do a quick check and we’ll decide what further tests or referral are sensible.”

3.Peripheral vs central: pattern recognition that changes everything

Do this from the doorway and on the way in—your decision to manage, admit or refer pivots on this.

Peripheral (most common in GP)

Central (red flags)

If you see vertical nystagmus, postural deficits or altered mentation—think central and consider immediate referral.

• Mentation: normal/bright
• Head tilt: usually towards the lesion
• Leaning/falling/circling: toward that side
• Nystagmus: horizontal or rotatory; slow phase typically toward the lesion
• Postural reactions & limb strength: normal
• Altered mentation (dullness, obtundation)
• Vertical nystagmus
• Postural reaction deficits or limb weakness
• Multiple cranial nerve deficits (context matters)
• Paradoxical vestibular signs: e.g. cerebellar lesions producing head tilt one side but postural deficits on the opposite side

4.History: the few questions you must ask

Focused, practical history gives you the differential shortlist quickly:

Remember: a normal otoscopic exam doesn’t rule out otitis media/interna (eustachian routes or haematogenous spread). Keep it on the radar.

• Ear history: head‑shaking, discharge, scratching, chronic otitis, prior ear meds, foreign body?
• Timeline: per‑acute onset is typical for idiopathic vestibular episodes.
• Medications & access: are they on meds (metronidazole is the classic one to flag) or could they have accessed tablets / toxins? If metronidazole is on board, stopping it while you reassess is reasonable.
• Recent ear treatment / possible tympanic membrane rupture: ototoxic agents can cause issues if they reach the inner ear.

5.The five‑minute neuro you’ll actually do: the “smelly‑treat dance”

Fast, practical, and owner‑reassuring. Do it in view of the owner:

Keep it simple: you’re looking for gross deficits that change the plan, not a neurology exam for a neurologist.

• CN I (olfaction): present a strong‑smelling treat—does the patient sniff?
• CN II (vision): move your hand from periphery—do they track it?
• CN III/IV/VI (eye position/movements): look for strabismus or abnormal eye position
• CN V (trigeminal): light facial touch, palpate masticatory muscles
• CN VII (facial): facial symmetry, lip droop, drooling, palpebral fissure size, palpebral reflex
• CN VIII (vestibular/hearing): clap for hearing; document nystagmus direction/type
• CN IX–X–XII: can the patient prehend a treat, chew and swallow? Is the tongue midline?
• Proprioception/strength: paw placement, turning, hopping where safe—any proprioceptive deficits are a red flag for central disease

6.Ears, facial nerve and Horner’s: the nuance

• Otoscopy is essential: chronic otitis externa, ruptured tympanic membrane, discharge, polyps or foreign bodies increase the chance of middle/inner ear disease.
• Facial nerve dysfunction and Horner’s syndrome can occur with peripheral (middle‑ear) disease; facial palsy alone doesn’t prove central disease. Use the full pattern (mentation, nystagmus type, postural reactions) to decide.

7.Dogs: likely differentials and a pragmatic GP plan

Admit for safety if the patient is continuously rolling or too nauseous to examine. Refer when there are central signs, young patients with serious deficits, or owners who want MRI/CSF and are prepared for referral.

• Most older dogs with the classic peripheral pattern = idiopathic/“geriatric” vestibular until proven otherwise.
• Practical in‑practice approach:
• Reassure the owner and set a 24–48‑hour expectation for improvement if peripheral pattern fits.
• Symptom relief: anti‑emetics can help patient comfort and owner confidence (clinicians vary in routine use).
• If ear history/exam supports otitis → treat ears and re‑check.
• Baseline bloods in older patients are useful (comorbidities, support referral decisions).
• Check blood pressure in calm patients—cheap and can pick up hypertensive causes.
• If metronidazole is a possible culprit, stop it and reassess.
• Plan a 24–48‑hour recheck. Worsening = change course.

8.Bilateral vestibular syndrome and paradoxical signs

• Bilateral peripheral vestibular dysfunction may present without a clear head tilt or nystagmus (eyes may cancel out), producing a low‑carriage, swaying “drunken” gait. These often improve with time.
• Differentiate bilateral peripheral causes from toxicosis by history and mentation—mentally dull/stunned patients are more likely to be toxic or central.
• Paradoxical vestibular signs (head tilt one way, postural deficits the other) suggest cerebellar involvement (central).

9.Cats: a different flavour

• Head tilt is less common in cats and central causes are relatively more likely in some presentations. Clinicians often have a lower threshold to refer if the owner can/wants to.
• Cats may take longer to improve than dogs; some reports suggest clustering, but treat these impressions cautiously.
• Consider nasopharyngeal polyps and neoplasia in cats with ear disease or central signs.

10.Rabbits: E. cuniculi, otitis and the Epley anecdote

• Common causes: Encephalitozoon cuniculi with CNS involvement, otitis media/interna (often Pasteurella), or both.
• Recent retrospective work from a UK referral centre described a mix: some rabbits with E. cuniculi alone, some with E. cuniculi plus otitis interna/media, and some with otitis interna/media alone. In practice many clinicians treat empirically for both and monitor response.
• Anecdote: some clinicians report striking responses to positional (Epley‑style) manoeuvres in rabbits if attempted early. Evidence is anecdotal—handle rabbits carefully if you try this and be cautious about interpretation (improvement may reflect natural recovery).

11.Practical GP checklist and a consult template idea

Standardising this in your PMS shortens consults and helps clear client communication.

• Triage: emergency? admit now? refer now?
• Focused history prompts: ear history, timeline, meds & access, recent ear treatments
• Quick pattern box: peripheral vs central features (tick boxes)
• Five‑minute CN screen: smelly treat, visual tracking, eye position, facial symmetry, clap, treat prehension, basic proprioception
• Red flags: vertical nystagmus, altered mentation, postural deficits, multiple CN deficits
• Useful baseline tests: bloods (older patients), blood pressure, otoscopy/ear exam
• Management options: symptomatic care & recheck, ear treatment if supported, short admission for calm re‑examination, referral if central or owner goals dictate

12.Closing takeaway

Head‑tilt consults look dramatic but are often peripheral and self‑limiting. Start with a calm opening script, do a rapid pattern check (peripheral vs central), run a five‑minute neuro screen, examine ears thoroughly and check meds. Use bloods and blood pressure to inform the whole‑patient picture. Admit for safety or calm time; refer for central signs or when owners want advanced diagnostics. Keep rabbits and cats on your differential list for different causes, and remember—facial palsy does not automatically mean central disease.