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Dew Claws Do Have a Purpose!
Dew Claws Do Have a Purpose!
Published: 2012/03/25
Channel: quartermoongoldens1
Breeder Insights: Why I Don
Breeder Insights: Why I Don't Remove Dew Claws
Published: 2015/01/05
Channel: Endless Mt. Labradors
Removing the Dewclaw - Myra Savant Harris
Removing the Dewclaw - Myra Savant Harris
Published: 2013/02/11
Channel: Myra Savant Harris
HOW THE DEW CLAW IS USED BY THE DOG
HOW THE DEW CLAW IS USED BY THE DOG
Published: 2012/06/27
Channel: GalenTherapyCentre
DSCF9392 Clipping ingrown dewclaws on a border collie
DSCF9392 Clipping ingrown dewclaws on a border collie
Published: 2014/10/04
Channel: DuAnn Chambers
How to Remove Dewclaws on a newborn Litter
How to Remove Dewclaws on a newborn Litter
Published: 2015/06/15
Channel: Kristen Hoy - Lawrence
Trim Toenails  :Overgrown Dewclaws
Trim Toenails :Overgrown Dewclaws
Published: 2012/05/14
Channel: Greg Martinez DVM
How to clip ingrown dew claws
How to clip ingrown dew claws
Published: 2011/01/29
Channel: DuAnn Chambers
Dauntless - Embermane Solo Smoked Dewclaw Farm Strategy (ALPHA)
Dauntless - Embermane Solo Smoked Dewclaw Farm Strategy (ALPHA)
Published: 2017/08/24
Channel: roar bear
OAKLEY TORE A DEW CLAW 😨
OAKLEY TORE A DEW CLAW 😨
Published: 2017/01/31
Channel: Snow Dogs Vlogs
Dew Claw Removal - Why is it done?
Dew Claw Removal - Why is it done?
Published: 2010/08/07
Channel: HelpUsFIghtTheBan
Broken Dog Dew Claws
Broken Dog Dew Claws
Published: 2015/01/30
Channel: Housebound Hounds
K9C Vet Dr. Marc Smith - Dewclaws
K9C Vet Dr. Marc Smith - Dewclaws
Published: 2012/06/23
Channel: K9 Contenders
Dew Claw and Tail Docking (Graphic)
Dew Claw and Tail Docking (Graphic)
Published: 2015/01/17
Channel: M00NSHINEBABIES
Why were Dew Claws invented?
Why were Dew Claws invented?
Published: 2012/12/01
Channel: nicknozzy
Castration and dewclaw removal
Castration and dewclaw removal
Published: 2014/04/14
Channel: Greg Martinez DVM
Dewclaw - Video Learning - WizScience.com
Dewclaw - Video Learning - WizScience.com
Published: 2015/08/07
Channel: Wiz Science™
Boston Terrier Puppy Dewclaw Removal *HD*
Boston Terrier Puppy Dewclaw Removal *HD*
Published: 2015/02/13
Channel: btpuppy2
Bull Terrier with an ingrown Dew Claw
Bull Terrier with an ingrown Dew Claw
Published: 2016/03/07
Channel: John Young
Like a Dewclaw
Like a Dewclaw
Published: 2017/08/24
Channel: Tera Melos - Topic
Trimming/Clipping Dewclaws
Trimming/Clipping Dewclaws
Published: 2017/09/11
Channel: Love of Grooming
Dewclaw removal with curved hemostat
Dewclaw removal with curved hemostat
Published: 2013/07/24
Channel: cl2ysta1stock
Dog
Dog's Dewclaw Ripped Off
Published: 2016/12/14
Channel: Christina Karras
Dewclaw Removal Technique on Day Old Puppy using Thumbnail Technique
Dewclaw Removal Technique on Day Old Puppy using Thumbnail Technique
Published: 2012/09/17
Channel: Gentry Boxers
What Is A Dew Claw On A Dog?
What Is A Dew Claw On A Dog?
Published: 2017/08/31
Channel: Call into Question
Chocolate lab puppies dewclaw removal day 3 bonus
Chocolate lab puppies dewclaw removal day 3 bonus
Published: 2015/09/17
Channel: GodivaLabradors San Jose
After Care of Tail Docked Rottweiler pup Uno and dew claw removal
After Care of Tail Docked Rottweiler pup Uno and dew claw removal
Published: 2017/05/29
Channel: Clifford Kennels
Dew claw trim
Dew claw trim
Published: 2015/02/21
Channel: Honey IShrunkthePigs
Educational Video Tail Docking, Ear Cropping and Dewclaw removal
Educational Video Tail Docking, Ear Cropping and Dewclaw removal
Published: 2015/08/19
Channel: Association For The Preservation Of Purebred Dogs
Embermane Smoked Dewclaw Farming | Dauntless
Embermane Smoked Dewclaw Farming | Dauntless
Published: 2017/08/28
Channel: Sir IceCream
Dewclaw Removal on 3 Day old Maltipoo / Poodle Puppies
Dewclaw Removal on 3 Day old Maltipoo / Poodle Puppies
Published: 2014/09/25
Channel: Macy & Nala Adventure
Great Pyrenees and their double dewclaws
Great Pyrenees and their double dewclaws
Published: 2012/04/17
Channel: maxwellsdaemon7
Dew Claw - "Sing Me to Death" - Live @ Shady Grove (Vol 4)
Dew Claw - "Sing Me to Death" - Live @ Shady Grove (Vol 4)
Published: 2017/04/08
Channel: Shady Grove
Dew Claw - Sticky Mind
Dew Claw - Sticky Mind
Published: 2007/07/02
Channel: GeodesicRecordings
yorkie 2 weeks Stella dewclaw removed
yorkie 2 weeks Stella dewclaw removed
Published: 2015/03/09
Channel: David Shambra
Zoe Dewclaw trim Bow Valley Vet Housecalls
Zoe Dewclaw trim Bow Valley Vet Housecalls
Published: 2012/07/06
Channel: vetjan10
Dewclaw removal using small forcepts/hemostat
Dewclaw removal using small forcepts/hemostat
Published: 2008/02/08
Channel: Deb Ammons
Cocker Spaniel Dew Claw Removal
Cocker Spaniel Dew Claw Removal
Published: 2015/01/26
Channel: RaesFurryCritters
Maximus Dewclaw Removal
Maximus Dewclaw Removal
Published: 2008/12/30
Channel: Astraean Border Collies
Dewclaw - Fruit Soup
Dewclaw - Fruit Soup
Published: 2017/06/03
Channel: JP Goguen
Dewclaw Removal With Suture Scissors
Dewclaw Removal With Suture Scissors
Published: 2015/07/23
Channel: Gentry Boxers
dew Claw use
dew Claw use
Published: 2017/11/06
Channel: becky chow
Dew Claw Puppies
Dew Claw Puppies
Published: 2013/06/15
Channel: Mary Knight
Kiaras dewclaw
Kiaras dewclaw
Published: 2012/06/06
Channel: BradyLawww
Miniature Pinscher Dew Claw Removal
Miniature Pinscher Dew Claw Removal
Published: 2009/06/24
Channel: MonkeyAlias
Painless tail docking and dew claw removal
Painless tail docking and dew claw removal
Published: 2013/01/24
Channel: Gentry Boxers
Broken Toenail on a Dog. Why you may not need the ER to resolve these.
Broken Toenail on a Dog. Why you may not need the ER to resolve these.
Published: 2016/06/20
Channel: Krista Magnifico
Dew Claw Removal
Dew Claw Removal
Published: 2015/02/17
Channel: Three Little Pitties
Dew Claw
Dew Claw
Published: 2017/11/10
Channel: Kelly SeBour
Lion Vs Hippo
Lion Vs Hippo
Published: 2009/12/06
Channel: JiaLiFeh
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WIKIPEDIA ARTICLE

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Letter "D" in the image indicates the dewclaw on this dog's front paw. Letter "E" is the carpal pad.
A dog's dewclaw does not make contact with the ground while the dog is standing. This older dog's dewclaw is rounded from use while running, but it has grown a little long.
This younger, active dog's dewclaw always makes contact while running, so it wears down naturally to its proper length, as do its other nails.
Unusual double dewclaws on rear leg of dog

A dewclaw is a digitvestigial in some animals – on the foot of many mammals, birds, and reptiles (including some extinct orders, like certain theropods). It commonly grows high on the leg such that in digitigrade species, when the animal is standing, it does not make contact with the ground. On dogs a dewclaw is on the inside of the leg, positioned analogously to a human thumb.[1]

Dogs[edit]

Dogs almost always have dewclaws on the inside of the front legs and occasionally also on the hind legs.[2] Unlike front dewclaws, rear dewclaws tend to have little bone or muscle structure in most breeds. It is normal, although not biologically necessary, that certain breeds will have more than one dewclaw on the same paw. At least one of these dewclaws will be poorly connected to the leg, and in this case it is often surgically removed[citation needed]. When a dog has extra dewclaws in addition to the usual one on each front leg, the dog is said to be double dewclawed. There is some debate about whether a dewclaw helps dogs to gain traction when they run because in some dogs, the dewclaw makes contact when they are running and the nail on the dewclaw often wears down in the same way that the nails on their other toes do, from contact with the ground. In many dogs the dewclaws never contact the ground. In this case, the dewclaw's nail never wears away, and it is often trimmed to maintain it at a safe length.

The dewclaws are not dead appendages. They can be used to lightly grip bones and other items that dogs hold with the paws. In some dogs these claws may not appear to be connected to the leg at all except by a flap of skin; in such dogs the claws do not have a use for gripping as the claw can easily fold or turn.[3]

Rear dewclaws[edit]

Canids have four claws on the rear feet,[4] although some domestic dog breeds or individuals have an additional claw. A more technical term for this fifth claw on the rear legs is hind-limb-specific preaxial polydactyly.[5] Several genetic mechanisms can cause rear dewclaws; they involve the LMBR1 gene and related parts of the genome.[5] Rear dewclaws often have no phalanx bones and are attached by skin only.[6]

Dewclaw removal[edit]

There is some debate as to whether dewclaws should be surgically removed.[7][8] The argument for removal states that dewclaws are a weak digit, barely attached to the leg, and thus they can rip partway off or easily catch on something and break, which can be painful and prone to infection. Dewclaw removal is most easily performed when the dog is young, around 2–5 days of age. It can also be performed on older dogs if necessary though the surgery may be more difficult then. The surgery is fairly straightforward and may be done with local anesthetics if the digit is not well connected to the leg. Many dogs can't resist licking the surgery site in the weeks following the procedure, so an Elizabethan collar or bitterant may be used to curtail this behavior, thus preventing infection.

There are some breeds that are born with dewclaws, notably the Great Pyrenees.[9]

Some pups are commonly sold by breeders "dew clawed," that is with the dewclaws removed (as by a veterinarian) for perceived health and safety reasons. A few breed standards also call for it.

Dewclaws and locomotion[edit]

Based on stop-action photographs, veterinarian M. Christine Zink of Johns Hopkins University believes that the entire front foot, including the dewclaws, contacts the ground while running. During running, the dewclaw digs into the ground preventing twisting or torque on the rest of the leg. Several tendons connect the front dewclaw to muscles in the lower leg, further demonstrating the front dewclaws' functionality. There are indications that dogs without dewclaws have more foot injuries and are more prone to arthritis. Zink recommends "for working dogs it is best for the dewclaws not to be amputated. If the dewclaw does suffer a traumatic injury, the problem can be dealt with at that time, including amputation if needed."[1]

Cats[edit]

Members of the cat family – including domestic cats[10] and wild cats like the lion[11] – have dewclaws. Generally a dewclaw grows on the inside of each front leg but not on either hind leg.[12]

The dewclaw on some cats is not vestigial. Wild felids use the dewclaw in hunting, where it provides an additional claw with which to catch and hold prey.[11]

Hoofed animals[edit]

Cloven hoofs of roe deer (Capreolus capreolus), with dewclaws

Hoofed animals walk on the tips of special toes, the hoofs. Cloven-hoofed animals walk on a central pair of hoofs, but many also have an outer pair of dewclaws on each foot. These are somewhat farther up the leg than the main hoofs, and similar in structure to them.[13] In some species (such as cattle) the dewclaws are much smaller than the hoofs and never touch the ground. In others (such as pigs and many deer), they are only a little smaller than the hoofs, and may reach the ground in soft conditions or when jumping. Some hoofed animals (such as giraffes and modern horses) have no dewclaws. Video evidence suggests some animals use dewclaws in grooming or scratching themselves or to have better grasp during mating.

References[edit]

  1. ^ a b Zink, M. Christine. "Form Follows Function – A New Perspective on an Old Adage" (PDF). Penn Vet Working Dog Center. p. 11. Retrieved 8 November 2015. 
  2. ^ Rice, Dan (2008). The Complete Book of Dog Breeding (2 ed.). Barron's Educational Series. p. 150. ISBN 978-0-7641-3887-4. 
  3. ^ Hoskins, Johnny D. (2001). Veterinary Pediatrics: Dogs and Cats from Birth to Six Months (3 ed.). Saunders. p. 251. ISBN 978-0-7216-7665-4. 
  4. ^ Macdonald, D. (1984). The Encyclopedia of Mammals. New York: Facts on File. p. 56. ISBN 0-87196-871-1. 
  5. ^ a b Park, K; Kang, J; Subedi, Kp; Ha, Jh; Park, C (Aug 2008). "Canine Polydactyl Mutations With Heterogeneous Origin in the Conserved Intronic Sequence of LMBR1" (Free full text). Genetics. 179 (4): 2163–72. doi:10.1534/genetics.108.087114. ISSN 0016-6731. PMC 2516088Freely accessible. PMID 18689889. 
  6. ^ Hosgood, Giselle (1998). Small Animal Paediatric Medicine and Surgery. Butterworth-Heinemann. p. 236. ISBN 978-0-7506-3599-8. 
  7. ^ Lotz, Kristina N. "The Dewclaws Debate – Keep Them or Lose Them?". iheartdogs.com. Retrieved 8 November 2015. 
  8. ^ "Dog Dew Claw Removal". vetinfo.com. Retrieved 8 November 2015. 
  9. ^ "pyrenean mountain dog double dewclaws xray". Pyrmont.tripod.com. Retrieved 2012-01-26. 
  10. ^ "Clipping a Cat's Claws (Toenails)". Pet Health Topics. Washington State University College of Veterinary Medicine. 22 July 2009. Retrieved 2 November 2013. Cats have a nail on the inner side of each foot called the dew claw. Remember to trim these as they are not worn down when the cat scratches and can grow in a circle, growing into the foot. 
  11. ^ a b "Physiology". Lion ALERT. Retrieved 2 November 2013. Lions have four claws on their back feet but five on the front where the dew claw is found. This acts like a thumb and is used to hold down prey while the jaws rip away the meat from bone. Set well back from the other claws the dew claw does not appear in the print. 
  12. ^ Bircher, Steve (5 November 2011), Tiger Tales (PDF), National Tiger Sanctuary 
  13. ^ Perich, Shawn; Furman, Michael (2003). Whitetail Hunting: Top-notch Strategies for Hunting North America's Most Popular Big-Game Animal. Creative Publishing international. pp. 8, 9. ISBN 978-1-58923-129-0. 

External links[edit]

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