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Beagle: health, lifespan and blood work

The Beagle is generally a healthy breed without an extreme body shape. Its most common problems in practice are weight gain and dental disease. Hypothyroidism and seizures are more frequent than in many dogs, and a few inherited disorders can show up on blood and clotting tests.

Tricolored Beagle standing on a lawn
Photo: Slyronit · CC BY-SA 4.0 · via Wikimedia Commons

Written by the AI DiagAnimals editorial teamReviewed by the AI DiagAnimals TeamUpdated Our editorial policy

The essentials

In UK primary care, obesity affected 24% of Beagles and periodontal disease 18%. Beagles had about 3 times the odds of hypothyroidism of crossbred dogs and almost twice the odds of seizures of Labradors. Rare inherited disorders include vitamin B12 malabsorption (Imerslund-Gräsbeck syndrome) and factor VII deficiency, a clotting disorder first described in the breed.

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Beagle at a glance

TraitDetail
OriginGreat Britain [1]
Breed groupFCI Group 6 (Scent hounds and related breeds), section 1.3, small-sized hounds; AKC Hound Group [1, 2]
WeightUnder 9 kg (20 lb) for Beagles up to 33 cm (13 in); 9–14 kg (20–30 lb) for those of 33–38 cm (13–15 in) [2]
Height33–40 cm (13–16 in) [1]
Life expectancyMedian age at death 11.3 years in UK primary care [3]; 12.5 years in a 2024 UK study [4]
CoatShort, dense and weatherproof; tricolour or several pied and two-colour patterns, tip of the tail white [1]

Origin

The Beagle is said to have been bred down from the larger Foxhound to hunt, mainly hare, with people following on foot. It is still used in packs, often run by institutions such as colleges and schools [1].

Under King Henry VIII and Queen Elizabeth I there were wire-haired Beagles, some small enough to be carried in the pocket of a hunting jacket. The breed has grown since, but small “pocket Beagles” are still sometimes born [1].

Common health problems

  • Everyday disorders: in a UK study of 3,729 Beagles under primary care, the most common diagnoses were obesity (24.3%), periodontal disease (17.8%), overgrown nails (11.6%), ear infection (otitis externa, 11.2%) and anal sac impaction (10.6%) [3].
  • Causes of death: neoplasia (19.3%), a mass (13.2%), poor quality of life (12.8%) and brain disorders (6.8%) were the most common [3].
  • Hypothyroidism: Beagles had 3.08 times the odds of crossbred dogs in UK primary care [5]. See hypothyroidism in dogs.
  • Seizures: Beagles had 1.91 times the odds of Labrador Retrievers of having seizures recorded [6].
  • Imerslund-Gräsbeck syndrome: an inherited inability to absorb vitamin B12 (cobalamin), caused in Beagles by a CUBN gene mutation. Affected puppies failed to thrive [7].
  • Factor VII deficiency: an inherited clotting disorder first described in Beagles and since found in 24 breeds and mixed-breed dogs; it ranges from no signs to life-threatening bleeding [8], and is usually mild to moderate [9].
  • Lafora disease: a fatal inherited disorder with toxic deposits of abnormal glycogen in the brain. Affected Beagles carried the same NHLRC1 repeat expansion as Miniature Wirehaired Dachshunds [10].

Tests and screening in Beagles

  • Thyroid tests: the breed is predisposed to hypothyroidism [5], so a thyroid result outside the interval deserves a careful reading with your vet.
  • Imerslund-Gräsbeck syndrome on blood and urine tests: affected young Beagles had low blood cobalamin, abnormal blood cell production with low neutrophils, methylmalonic acid in the urine, high ammonia and protein in the urine [7]. See the white blood cell count and protein in urine.
  • Clotting tests: factor VII deficiency causes slowed clotting [8]. A DNA test looks for the F7 variant; in one laboratory a nearby polymorphism caused the normal allele to be missed in several Beagles until the test was redesigned [9].
  • Weight and teeth: obesity and dental disease are the most frequent problems, and the study authors recommend special emphasis on bodyweight control and dental hygiene [3].
  • Routine blood work: no breed-specific reference values have been published; results are read with the laboratory’s usual dog intervals. See the CBC for dogs.

Related articles

White blood cell count in dogs

Neutrophils and what a low count means.

Read the article

En français : Beagle.

Questions to ask your veterinarian

  1. Is my Beagle at a healthy weight, and what should it weigh?
  2. Should my dog’s thyroid be tested?
  3. Do my dog’s teeth need cleaning?
  4. Should my dog have a clotting test before surgery?
  5. What should I do if my dog has a seizure?
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Frequently asked questions

How long do Beagles live?

The median age at death was 11.3 years in UK primary care [3] and 12.5 years in a larger 2024 UK study [4].

What health problems do Beagles have?

The most common are obesity, dental disease, ear infections and anal sac problems [3]. Hypothyroidism [5] and seizures [6] are more frequent than in many dogs.

Are Beagles prone to hypothyroidism?

Yes: in UK primary care they had 3.08 times the odds of crossbred dogs [5].

Why do Beagles get fat?

Obesity was the most common diagnosis in Beagles, affecting 24.3% in a UK study [3]. Your vet can help you set a target weight.

What is factor VII deficiency in Beagles?

An inherited clotting disorder first described in Beagles, usually mild to moderate, with a DNA test [8, 9].

Sources

  1. Fédération Cynologique Internationale. FCI Standard No. 161: Beagle. fci.be/Nomenclature/Standards/161g06-en.pdf
  2. American Kennel Club. Beagle: dog breed information. akc.org/dog-breeds/beagle
  3. O’Neill DG et al. Beagles kept as companion animals in the UK – demography, disorders and mortality. Companion Anim Health Genet. 2025;12(1):1. doi.org/10.1186/s40575-024-00140-9
  4. McMillan KM et al. Longevity of companion dog breeds: those at risk from early death. Sci Rep. 2024;14:531 (supplementary Table S3). doi.org/10.1038/s41598-023-50458-w
  5. O’Neill DG et al. Frequency, breed predispositions and other demographic risk factors for diagnosis of hypothyroidism in dogs under primary veterinary care in the UK. Canine Med Genet. 2022;9(1):11. doi.org/10.1186/s40575-022-00123-8
  6. Erlen A et al. Seizure occurrence in dogs under primary veterinary care in the UK: prevalence and risk factors. J Vet Intern Med. 2018;32(5):1665-1676. doi.org/10.1111/jvim.15290
  7. Fyfe JC et al. Selective intestinal cobalamin malabsorption with proteinuria (Imerslund-Gräsbeck syndrome) in juvenile Beagles. J Vet Intern Med. 2014;28(2):356-362. doi.org/10.1111/jvim.12284
  8. Clark JA et al. Investigation of a common canine factor VII deficiency variant in dogs with unexplained bleeding on autopsy. J Vet Diagn Invest. 2022;34(5):806-812. doi.org/10.1177/10406387221118581
  9. Ramirez CJ et al. Canine factor VII deficiency: lessons learned in applying methods-based laboratory proficiency testing. J Vet Diagn Invest. 2019;31(2):276-279. doi.org/10.1177/1040638718825281
  10. Hajek I et al. NHLRC1 repeat expansion in two beagles with Lafora disease. J Small Anim Pract. 2016;57(11):650-652. doi.org/10.1111/jsap.12593

Laboratory methods and reference intervals vary. This article explains; it does not diagnose. For a decision about your pet, use the original report and talk to your veterinarian. Our editorial policy.

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