Getting the Basics of Jack Russell Terriers
Most Jack Russell Terriers (JRTs) make wonderful pets, but not all make wonderful show dogs. It's much easier to find a dog of pet quality than it is to find a dog of breeding or show quality. Don't allow a breeder to dissuade you from a dog you're drawn to in favor of a more expensive show-quality dog unless you're seriously planning to breed or show your dog. Although the other dog may meet show standards, the most important feature in a pet is personality. Allow your temperament and preference to be your guide.
In the end, it is important to buy from a reputable breeder and to buy the healthiest dog you can find that best fits the criteria you have selected as important. Unless you're planning to show your terrier in conformation classes, forgive weaknesses that are unimportant to you, provided they don't jeopardize the health and future of your pet. Personality, temperament, and appeal are the most important qualities you should consider, and then have your dog spayed or neutered as soon as your vet says it's feasible. Don't fall into the lure of breeding a pet-quality dog just to raise a few bucks. It won't pay off in the long run, and you will be adding to the problems the breed already faces — overpopulation and indiscriminate breeding.
Overall appearance
Overall, the terrier must appear to be alert and energetic. He also should appear to be quick-witted, should be eager to join the fray, and should be confident in his actions. The dog should appear balanced and square, even at first glance, and should give the appearance of strength and good health.
Because the Jack Russell Terrier was bred to be a hunting dog, he must appear ready for action and excitement and should present a picture of a friendly, outgoing dog with a bright look and a cheerful expression. If you've seen even one Jack Russell Terrier, you've probably noticed that quick, eager-to-pounce look in his eyes, especially if you pick up a ball or another toy.
Basic temperament
Although a JRT always should be game for a good hunt, he shouldn't have a hair-trigger bark, shouldn't yap at anything that passes by, and shouldn't appear anxious or nervous. A dog that feels the need to bark at the slightest perceived threat usually is timid by nature, a definite fault in the Jack Russell breed. Any inclination toward cowering, timidity, or nervousness is also undesirable. Even as a pet, you can see why these traits are frowned upon. Because the JRT's bark is quite loud and distinct, you really don't want to be awakened ten times during night because your JRT thinks he may possibly hear something as far as ten blocks away.
Don't confuse nervousness with high energy. A Jack Russell Terrier is always on the move, hunting and exploring his surroundings. An anxious dog — one who routinely paces or is easily upset by changes in his surroundings — isn't considered to be of ideal JRT temperament.
Although the Jack Russell should be confident in his actions, overt aggression — especially toward humans — isn't a desired trait. The JRT is bred to be confident in his job as a hunter and to either flush quarry out of its den or hold the quarry in the hole until his master comes and calls him off. Except for his job as a rat hunter, the dog isn't asked to attack the quarry, and any such tendencies are seriously frowned upon. As a hunting dog, the JRT should work alongside his master, holding when asked and relinquishing his prey when commanded. He should happily comply with his owner's wishes and should be neither encouraged to display aggression nor punished for being bold.
Intelligence
Along with their alert, energetic appearance, JRTs should also exude intelligence, which they often do to a maddening degree. The dog is quick to solve problems and is eager to find ways around perceived barriers. All this quick thinking makes the dog delightful to be around and humorous to watch. But be careful. Many Jack Russells have been known to outsmart their owners!
Charming and playful, the JRT is happiest in the company of his owner, either snuggled up on a bed or curled up at your feet, but always on the lookout for a good game of ball. Remember, however, that the Jack Russell Terrier is far from a couch potato. He needs regular play periods throughout the day to be truly content.
When at a loss for a playmate, the JRT is likely to create his own entertainment, either by tearing through the house at breakneck speed like a drag racer, by teaching himself to sit like a gopher to get your attention, or by barking at you and then running off to try to entice you to play. The bottom line is, you have to have a sense of humor to appreciate a Jack Russell Terrier.

Dogs Glossary
A-B-C assessment
Checking a dog’s airway, breathing, and circulation.

Dogs Glossary
animal shelter
1. An animal control agency run by local government to protect people from animals, take in strays, and manage animal issues and problems within the community. 2. A privately run shelter managed by individuals who want to protect, advocate for, and find homes for animals.

Dogs Glossary
BARF diet
A method of feeding dogs as closely as possible what they would eat in the wild: raw flesh and bones, along with vegetable matter from the stomachs of their prey. The acronym stands for either Bones and Raw Food or Biologically Appropriate Raw Food.

Dogs Glossary
blow out
A twice-yearly shedding of a dog’s undercoat.

Dogs Glossary
blue slip
An application to register a purebred puppy.

Dogs Glossary
breeder
A person who raises, sells, and often shows dogs of a specific breed. Reputable breeders screen parent dogs in an effort to produce healthy dogs that conform to breed standards.

Dogs Glossary
castrate
The removal of a male dog’s testicles to render him infertile.

Dogs Glossary
check
A crisp, brief snap on a dog’s leash to discourage his current behavior.

Dogs Glossary
clicker
A small hand-held device that makes a sharp cracking sound when pressed. Paired with a food reward, an effective dog-training tool.

Dogs Glossary
cohesive bandage
A stretchy wrap that clings to itself used to cover and secure gauze bandages without tape.

Dogs Glossary
come into season
The advent of a female dog’s term of fertility.

Dogs Glossary
dead ring
The stationary ring on a training collar that pulls on the collar, not the dog’s neck.

Dogs Glossary
double coat
Two layers of fur — a top coat of stiff guard hairs and an undercoat that serves as insulation.

Dogs Glossary
dropped ears
The term for hanging or drooping dog ears.

Dogs Glossary
Elizabethan collar
A wide, cone-shaped plastic or cardboard collar that prevents a dog from being able to scratch her head. Used to prevent further injury or hasten healing.

Dogs Glossary
euthanize; put to sleep
To kill an animal to relieve suffering.

Dogs Glossary
fall
Hair that extends over a dog’s eyes.

Dogs Glossary
feathering
Long hair that runs from armpit to paw on the backs of a dog’s legs.

Dogs Glossary
free-feeding
Keeping a constant supply of dog food available so that the dog can decide when and how much to eat. It works best in single-dog households where there’s no competition for food.

Dogs Glossary
heartworms
Parasites that live in dogs’ hearts and cause heart failure. They’re transferred through mosquito bites.

Dogs Glossary
heat
The period when a female dog is fertile.

Dogs Glossary
heel
A command and position in which a dog walks at your left side staying with you as you change direction or pace.

Dogs Glossary
hip dysplasia
A painful malformation of a dog’s hip socket. Some breeds are genetically predisposed to the condition.

Dogs Glossary
hot spot
A localized area of skin infection. It’s usually round, red, and warm to the touch.

Dogs Glossary
live ring
The floating ring of a training collar. Attach a leash to this ring for training purposes.

Dogs Glossary
neuter
A general term to describe either spaying or castrating a dog to render it infertile. Neutering and castrating are often used interchangeably.

Dogs Glossary
pantaloons
The tufts of hair on the backs of a long-haired dogs legs that make him look like he’s wearing bloomers.

Dogs Glossary
pedigree
A diagram of a dog’s ancestors for three or more generations that lists the registered names of the dogs and the titles they earned.

Dogs Glossary
pinch collar
A training collar with interlocking prongs that pinch a dog’s neck when tugged on. Some veterinarians recommend them above all other collars for training purposes.

Dogs Glossary
praise
A verbal reward for a dog , such as an enthusiastic good dog!

Dogs Glossary
prong collar
A training collar with interlocking prongs that pinch a dog’s neck when tugged on. Some veterinarians recommend them above all other collars for training purposes.

Dogs Glossary
pulse
Normal dog pulse is between 70 and 120 beats per minute. The pulse of a puppy ranges from 120 to 160 beats per minute.

Dogs Glossary
puppy mill
A place that supplies puppies to pet stores, usually without screening for possible genetic defects or properly socializing the puppies.

Dogs Glossary
quick
The pink part of a dog’s toenail. It supplies blood to the nail.

Dogs Glossary
registration certificate
The paper certifying a dog’s registration with an accredited organization.

Dogs Glossary
registration slip
An application to register a purebred puppy.

Dogs Glossary
release word
A word that lets a dog know that she is free to move.

Dogs Glossary
rescue group
A network of animal lovers who rescue and find new homes for their favorite breeds or animals.

Dogs Glossary
reward
To give a dog a treat for a correct response while he’s still in the desired position.

Dogs Glossary
ruff
The long, thick fur around a dog’s chest, shoulders, and neck.

Dogs Glossary
separation anxiety
A condition in which your dog becomes anxious and stressed when you leave him.

Dogs Glossary
shed
A twice-yearly process of casting off the undercoat in a double-coated dog.

Dogs Glossary
single coat
A single layer of hairs that comprises a dog’s fur.

Dogs Glossary
spay
To remove of both the uterus and the ovaries of a dog to render her infertile.

Dogs Glossary
stripping
Plucking the dead hairs from a dog’s coat.

Dogs Glossary
titer tests
Tests that check a dog’s immunity levels to determine exactly which vaccinations are needed.

Dogs Glossary
top coat
The top layer of a double-coated dog composed of stiff guard hairs that tend to be naturally water-repellant. The top coat protects the dog’s skin and undercoat.

Dogs Glossary
training collar
A collar that enables you to guide your dog and to check her as necessary — a brief, sharp tug tightens the collar around the dog’s neck.

Dogs Glossary
treat cup
A plastic container filled with small treats or dog food. Shake it and give treats from it as a reward as you train a dog.

Dogs Glossary
undercoat
Fleecy or downy fur shorter than the top layer of a double-coated dog. The undercoat serves as insulation.