The English word dog comes from Middle English dogge, from Old English docgaa "powerful dog breed". It is believed this "dog" type was so common, it eventually became the prototype of the category "hound". German, like other European languages, has a word borrowed from the English dog which refers specifically to mastiffs. The process of birth is "whelping", from the Old English word hwelp; the modern English word "whelp" is an alternative term for puppy.
Dog anatomy Domestic dogs have been selectively bred for millennia for various behaviors, sensory capabilities, and physical attributes. Size and weight Dogs are highly variable in height and weight.
The smallest known adult dog was a Yorkshire Terrierthat stood only 6. The largest known dog was an English Mastiff which weighed Another study suggested that dogs can see the earth's magnetic field. Coat dog Dogs display a wide variation on coat type, density, length, color, and composition The coats of domestic dogs are of two varieties: Domestic dogs often display the remnants of countershadinga common natural camouflage pattern.
A countershaded animal will have dark coloring on its upper surfaces and light coloring below,  which reduces its general visibility. Thus, many breeds will have an occasional "blaze", stripe, or "star" of white fur on their chest or underside.
Docking There are many different shapes for dog tails: As with many canids, one of the primary functions of a dog's tail is to communicate their emotional state, which can be important in getting along with others.
In some hunting dogs, however, the tail is traditionally docked to avoid injuries. Domesticated dogs are clearly distinguishable from Domestic dog in hindi by starch gel electrophoresis of red blood cell acid phosphatase.
Dog health There are many household plants that are poisonous to dogs and other mammals including begoniaPoinsettia and aloe vera. Two serious medical conditions particularly affecting dogs are pyometraaffecting unspayed females of all types and ages, and gastric dilatation volvulus bloatwhich affects the larger breeds or deep-chested dogs.
Both of these are acute conditions, and can kill rapidly.
Dogs are also susceptible to parasites such as fleasticksand mitesas well as hookwormstapewormsroundwormsand heartworms. A number of common human foods and household ingestibles are toxic to dogs, including chocolate solids theobromine poisoningonion and garlic thiosulphatesulfoxide or disulfide poisoning grapes and raisinsmacadamia nutsxylitol as well as various plants and other potentially ingested materials.
Dogs can be exposed to the substance by scavenging garbage or ashtrays; eating cigars and cigarettes. Signs can be vomiting of large amounts e.
Some other signs are abdominal pain, loss of coordination, collapse, or death. Theobromine is toxic to dogs because, although the dog's metabolism is capable of breaking down the chemical, the process is so slow that for some dogs even small amounts of chocolate can be fatal, especially dark chocolate.
Dogs are also vulnerable to some of the same health conditions as humans, including diabetesdental and heart disease, epilepsy, cancer, hypothyroidism, and arthritis. Aging in dogs Mixed-breed dogs such as this terrier have been found to run faster and live longer than their pure-bred parents See heterosis Ina study found that mixed breeds live on average 1.
The breed with the shortest lifespan among breeds for which there is a questionnaire survey with a reasonable sample size is the Dogue de Bordeauxwith a median longevity of about 5. Canine reproduction Dog nursing newborn puppies In domestic dogs, sexual maturity begins to happen around age six to twelve months for both males and females,   although this can be delayed until up to two years old for some large breeds.
This is the time at which female dogs will have their first estrous cycle. They will experience subsequent estrous cycles semiannually, during which the body prepares for pregnancy.
At the peak of the cycle, females will come into estrus, being mentally and physically receptive to copulation. An average litter consists of about six puppies though this number may vary widely based on the breed of dog.
In general, toy dogs produce from one to four puppies in each litter, while much larger breeds may average as many as twelve. Some dog breeds have acquired traits through selective breeding that interfere with reproduction.
Male French Bulldogsfor instance, are incapable of mounting the female. For many dogs of this breed, the female must be artificially inseminated in order to reproduce. Because of the overpopulation of dogs in some countries, many animal control agencies, such as the American Society for the Prevention of Cruelty to Animals ASPCAadvise that dogs not intended for further breeding should be neutered, so that they do not have undesired puppies that may later be euthanized.
Spaying or castrating dogs helps keep overpopulation down. Neutering reduces problems caused by hypersexualityespecially in male dogs. Mortality due to infection increased significantly with increases in inbreeding.The Indian pariah dog or Indian native dog (Canis lupus familiaris) is the aboriginal landrace of the Indian lausannecongress2018.com erroneously used to refer to all urban Indian street dogs, some free-ranging dogs in India do not match the "pariah type" and may not be pure indigenous dogs but mixed breeds, especially around locations where European colonists historically settled in India, due to.
dog, domestic dog, Canis familiaris (noun) a member of the genus Canis (probably descended from the common wolf) that has been domesticated by man since prehistoric times; occurs in many breeds "the dog barked all night".
A family film set in the European where Flanders used to be (now parts of Belgium & France). This is a story about a young artist who finds inspiration in a dog he helps to nurse back to health. Request for Proposals Yamhill county is seeking proposals from qualified proposers for consulting engineering services during design and construction of the .
Convinced his stepfather caused the crash that left his mother in a coma, a law student drunkenly agrees to his murder, then can't rescind the deal. Watch trailers & learn more. This page gives a list of domestic animals, also including a list of animals which are or may be currently undergoing the process of domestication and animals that have an extensive relationship with humans beyond simple predation.