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  • Author or Editor: Alix R. McBrearty x
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To investigate changes in owner-reported pain, interference of pain on function, and quality of life (QOL) in dogs with clinically suspected osteoarthritis when wearing a collar containing a static magnet.


16 dogs over 5 years old weighing between 10 and 40 kg with a clinical diagnosis of osteoarthritis and on stable treatment.


A prospective, blinded crossover study in which dogs wore a collar containing a static magnet or placebo for two 4-week study arms separated by a 2-week washout period. Clients completed the Canine Brief Pain Inventory prior to collar placement and then weekly throughout each arm. Changes in QOL, pain severity, and pain interference scores from the beginning to the end of these arms and changes between the arms were calculated and analyzed using Wilcoxon signed rank tests.


40% of included dogs were on stable doses of NSAIDs. The pain severity scores (PSS), pain interference scores (PIS), and QOL scores were not significantly different at the start of the arms. There was no significant change in PSS or PIS from the start to end of the placebo arms (median changes, 0 and –0.1). Both PSS and PIS reduced significantly during the magnet arms (median changes, –1.0 and –1.2, respectively). The QOL scores did not change significantly in either arm (median changes, 0 and 0).


This preliminary study suggests that magnetic collars reduce owner-reported pain severity and pain interference on function in dogs with clinically suspected osteoarthritis, and further, larger investigations are now warranted.

Free access
in Journal of the American Veterinary Medical Association


Objective—To investigate the association of 6 clinical features with outcome of dogs with generalized megaesophagus.

Design—Retrospective cohort study.

Animals—71 client-owned dogs with radiographic evidence of generalized esophageal dilation.

Procedures—Medical records were reviewed for data on signalment, age at onset of clinical signs, body weight, evidence of undernutrition, and the administration of drugs to treat or prevent esophagitis. Radiographs were reviewed for evidence of aspiration pneumonia (AP) and to calculate the relative esophageal diameter. Details of outcome were collected from the medical records and by contacting owners and referring veterinarians. The association of 6 factors with death before discharge and overall survival time was assessed.

Results—Overall median survival time was 90 days. Nineteen (26.7%) patients died before discharge from the hospital. Radiographic evidence of AP was both positively associated with death before discharge and negatively associated with overall survival time. An age at onset of clinical signs of >13 months was negatively associated with overall survival time. No evidence of an association of the degree of esophageal dilation or the use of drugs to prevent or treat esophagitis with death before discharge or overall survival time was found.

Conclusions and Clinical Relevance—Radiographic evidence of AP and the age at onset of clinical signs were the only variables found to be significantly associated with survival time in this study, and this should be considered when advising on prognosis in dogs with megaesophagus.

Full access
in Journal of the American Veterinary Medical Association