26/06/2025
This is a great post which backs up what I'm always saying about collar vs harness.
✨ Structures Around Your Dog’s Neck – Why a Harness Matters ✨
Collar vs Harness is a frequently debated topic, but from a musculoskeletal and neurological perspective, the evidence strongly supports the use of a well-fitted harness over collars—particularly for dogs that pull on the lead.
❗ Contrary to popular belief, harnesses do not encourage pulling—lead pulling is a training issue, not a consequence of the equipment used.
⚠️ Potential Risks of Neck Pressure from Collars:
1. Muscles of the Neck:
Collars can cause soft tissue trauma including contusions, strains, and micro-injuries to cervical muscles, contributing to pain and dysfunction (Pauli et al., 2006).
2. Spinal Cord & Vertebrae:
Repetitive or forceful pressure may result in cervical spinal compression, intervertebral disc herniation, or spondylosis deformans. This can lead to chronic pain and impaired mobility (Ogburn, 2020).
3. Nerve Damage – Including the Vagus Nerve:
The vagus nerve, which runs through the neck, influences heart rate, digestion, and respiratory function. Chronic pressure may lead to gastrointestinal upset, or cardiovascular changes (Dobias, 2015).
4. Arteries & Veins:
Neck pressure can increase intracranial pressure, restrict cerebral blood flow, and raise intraocular pressure, potentially exacerbating neurological or ocular conditions (Pauli et al., 2006; NTU, 2020).
5. Larynx, Oesophagus & Trachea:
Force from collars may cause laryngeal bruising, tracheal collapse, or difficulty swallowing—particularly in small or brachycephalic breeds.
6. Hyoid Apparatus:
Although rare, trauma to this delicate structure, which supports the tongue and larynx, may cause pain or swallowing dysfunction.
7. Thyroid Gland:
Located in the neck, the thyroid gland is vulnerable to chronic trauma. Repeated collar pressure may cause inflammation, leading to immune-mediated hypothyroidism, particularly in large, strong-pulling breeds (Dobias, 2015).
8. Eyes & Vision:
Studies have shown that pressure on the neck from collars significantly increases intraocular pressure, posing risks for dogs with glaucoma or corneal injury (Pauli et al., 2006).
🙏 Please consider:
If your dog pulls, or if you’re guiding them by a collar or head collar, you may be unknowingly putting these critical structures at risk.
A correctly fitted Y-front or support harness helps distribute pressure across the chest and shoulders, protecting the delicate anatomical structures of the neck.
📚 References:
• Pauli, A. M., Bentley, E., Diehl, K. A., & Miller, P. E. (2006). Effects of the application of neck pressure by a collar or harness on intraocular pressure in dogs. Journal of the American Animal Hospital Association, 42(3), 207–211. PMC4925585
• Nottingham Trent University. (2020). Collars risk causing neck injuries in dogs. NTU Article
• Dobias, P. (2015). Dog Collar Injuries Can Cause Thyroid Disease. Peter Dobias DVM Blog
• K9 Bridle. Dogs That Pull on the Lead. K9Bridle
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