Critical Periods and Development
Age (weeks) 3-14: |
Socialization Period. If socialized later than 14 weeks, (or between 12-14 weeks in some dogs) shyness or aggressiveness may dominate behavior. |
Age (weeks) 6-8: |
Optimum Socialization. If socialization earlier, shyness often develops, along with over-dependence on owner, which may lead to over-protectiveness.
|
Age (weeks) 8-10: |
Fear Imprint. Traumatic, fear-producing experiences may be permanently impressed causing defensive reactions in some circumstances. |
Age (weeks) 12-14: |
Puberty Onset. Meaningful sexual mounting often occurs. Males display erections. |
Age (weeks) 18-40: |
Protective-Aggressive. Barking at strangers and other territorial and social group protective tendencies may occur. Leg lifting may begin in males.
|
Age (weeks) 35-56: |
Functional. Many dogs become more serious about protective-aggressive behavior problems is noted and corrections become more difficult.
|
Age (weeks) 104-208: |
Achievement. Protective-agressive behavior can become especially purposeful. Problem behavior appears to become self-rewarding, habitual. Corrections markedly more difficult. |
CRITICAL STAGES OF CANINE DEVELOPMENT
The notion of Critical Stages of Canine Development has been well covered
in both scientific and popular literature and is based primarily on the work
of Dr. John Scott and Dr. John L. Fuller in the 1940's, 1950's. and 1960's.
Clarence Pfaffenberger's book The New Knowledge of Dog Behavior introduced
these stages of development to breeders, trainers, and pet owners over 20 years
ago. Jack and Wendy Volhard and Richard Wolters further popularized this field
by introducing puppy aptitude testing based, in part, on Drs. Scott and Fuller's
findings. Drs. Michael Fox and Ian Dunbar, initially studying canine development
and behavior in clinical settings, have written copiously for the lay press
regarding puppy socialization. Unfortunately, many other writers unfamiliar
with the original research have led new puppy owners into believing that a
puppy purchased at an age older than exactly 7 weeks will bond less well and
be less trainable than a puppy purchased at exactly 49 days of life.
This "urban myth" is most vexing to breeders as the 49th day of life may be the earliest time a puppy may leave its litter mates, but may not be the best time. So here to debunk some of these myths is a synopsis of the critical periods of puppy development from a breeder's point of view:
First Period - Birth to 21 days.
Neonatal sub-period 0 - 13 days:
Characteristics: Puppies are "foetuses out of the womb". They cannot see, hear, regulate their own body temperatures, or eliminate without stimulation and are totally dependent upon their dam or a surrogate mother.
No emotional development, social attachment, or learning takes place during this period. Puppies' brain waves remain constant whether sleeping or awake. Puppies do, however, exhibit reflex reactions to hunger, cold, and touch. They pile for warmth or spread out if too hot, but cannot regulate their own temperature by shivering or panting.
During this neonatal period puppies will crawl backward and forward and will swing their heads from side to side, often repetitively while mewing or trilling. These movements appear to be involuntary and prepare pups muscles, nervous system, and inner ear for further development.
Breeder Do's: |
Keep bitch happy, healthy, and well-fed. Her physical and emotional well-being will supply everything the puppies need during this stage. Handle puppies very gently with very slow, massaging movements. Very light stimulation of the nervous system (called "pre-stressing") may be beneficial when applied during the second week of life. This could involve rotating pups gently in your hands, applying light pressure to the ear leather, and holding each pup gently on its back for a few seconds each day. Pups should, of course be weighed daily to monitor growth and this would be a good time to handle each pup. This is NOT SOCIALIZATION OR TRAINING. Pre-stressing does, however, assist in developing brain cells. |
Breeder Don't's: |
Do not allow visitors (human or canine) during this period. Avoid anything that will stress the bitch (house guests, parties, home repairs, etc.) Also try not to move puppies or remove mother from the litter at this time. If the pups or dam need to see a veterinarian try to arrange for a home visit. Despite the common practice this is not a good age to take a litter to a dog show in your van, trailer, or motor home. |
Transition Sub-period 13 - 21 days:
Characteristics: Eyes and ears open and pups slowly begin responding to light, movement, and sound. Puppies become more mobile as they gain awareness of their surroundings, their mother, litter mates, and objects. Pups may also begin to alert to human presence during this period. This is still a reaction to stimuli rather than a social bond or emotional attachment.
Pups will attempt to get up on their feet, but continue crawling backward and forward. They may begin trying to get out of whelping box toward end of this period.
Breeder Do's: |
Introduce toys as obstacles to climb over or bump into. This helps pups develop spatial awareness. Some pups may begin briefly interacting with toys near the end of the third week. Continue handling pups daily using slow, massaging movements. Pups are growing fast and need frequent nail trimming. Introduce brushing with a soft brush. Again, this is not training but stimulation. |
Breeder Don't's: |
Avoid startling pups with loud noises or sudden movements while hearing and eyesight are developing. If you must move or change puppies' environment, this is the time to do so. Do NOT remove from dam.
|
Second Period - 21 to 28 days.
Characteristics: Most important period with rapid sensory development. Puppies are fully alert to their environment and will startle easily at sudden sounds and movements. During this time they are able to recognize their breeder and other significant humans by smell, sight and sound. However, they have lost the natural insulation of the neonatal period and negative events can easily imprint in basic behavior during this period.
Social bonding begins to occur during this week.
Neonatal behaviors such as head swinging, mewing and crawling back and forth stop. Pups are more active and moving well on their feet. This is a time of rapid physical change. There are also significant changes in brain waves during this period and pups are now able to learn from experiences and to retain what they have learned.
Breeder Do's: |
Introduce new tactile sensations in puppies' box; pups enjoy burrowing in shredded newspaper, for example, or crawling over a rolled up towel or blanket. Continue daily handling, adding new sounds and sights to the environment radio, TV, telephone, computer printer. Introduce toys that make sounds. Pups can be removed from the box and placed on new surfaces. Do this with two pups at a time rather than separating one from the litter. |
Breeder Don't's: |
AVOID LOUD NOISES OR SUDDEN CHANGES DURING THIS PERIOD. Negative events can permanently imprint on pups during this week. Do not run vacuum cleaner around pups, blow hair dryers, run clippers, etc. Postpone having work done on your home and ask prospective purchasers or curious friends to wait until the end of the 4th week to visit puppies. Do not move puppies or separate from dam during this week. |
Third Period - 21 to 49 days.
Characteristics: Social awareness, learning to become dogs (note: first week of this critical stage of development overlaps with second period of development). Play fighting behavior becomes increasingly intense. Pups are developing problem solving abilities, physical coordination, bite inhibition. Mother begins weaning pups during this period, thus beginning to initiate discipline. During this time puppies will begin to move to the far corners of their bed, box or pen to urinate and defecate. House breaking can begin!
Breeder Do's: |
During entire period leave pups together as litter and allow dam free access to pups.
During 4th week (21-28 days) introduce food to pups without removing
dam. You can feed her in the litter box at the same time. Begin escalating
sensory experiences (see notes on second critical period). Continue daily
handling by breeder and family members.
During 5th week (28-35 days) introduce pups to the outdoors. Take them
outside to urinate and defecate after waking or eating. When this is
not possible provide pups with a designated bathroom spot to begin their
housebreaking.
Begin handling pups individually away from litter mates and dam for at least 10 minutes each day. Enlist the help of family members, friends, neighbors and prospective puppy owners in this process. If you cannot handle 10 minutes each, do 5 minutes each. Daily experiences away from litter mates are crucial.
During 6th and 7th weeks (35-40 days) increase sensory experiences with brief car rides. Introduce pups to vacuum cleaner. Puppies can begin simple training routines using food lures and social attraction at this time. Start teaching pups to stand on grooming table to be examined or to be brushed.
This is the prime socialization period. Introduce new people, especially children. Pups enjoy interaction with a gentle adult dog, kindly aunt or uncle who will baby-sit with patience. |
Breeder Don't's: |
Introduce situations that will stimulate problem solving behavior -- tunnels, cardboard boxes, gates, steps, fences, logs, etc. Allow pups to have successes and reinforce these successes with food.
DO NOT REMOVE PUPPIES FROM LITTER DURING THIS PERIOD!! Do not completely remove mother. Do not correct pups for play fighting, housebreaking errors, or mouthing. |
Fourth Period - 49 days to 12 weeks.
Characteristics: Enlarging social awareness and bonding outside of litter. Mental abilities are fully formed but pups lack experience. This is the optimum time to teach new things and is, in fact, the period of fastest learning. Research has shown that behaviors can be shaped and modified most easily during times when learning is occurring most quickly. Training during this time will actually increase the capacity to learn by increasing brain cells in the appropriate regions of the brain.
Bladder and bowel control develop and pups are capable of sleeping through the night without an accident.
Breeder Do's: |
Greatly enlarge the puppies' world between 49 and 56 days. Begin puppy rotation, behavior chain and can make associations.
|
Breeder Don't's: |
Do not isolate pups from humans or unnecessarily restrain during this period (only restraints should be crate or necessary fencing). Avoid inadvertently reinforcing fearful responses.
|
NOTE: First fear imprint period occurs between 8-10 weeks. Avoid placing pups during this time. Avoid shipping pups, and other traumatic experiences.
Pups that have been properly socialized and bonded with breeder
can be successfully placed at 10-12 weeks after they have passed the first
fear imprint period and while they are still young enough to be "babies".
Fifth Period - 3 to 4 months.
Characteristics: Dominance period where pup solidifies social position. Pups will begin testing their place in the world during this time. They tend to become emboldened. This is a period of very fast physical growth.
Breeder Do's: |
Pups must be treated as individual dogs. If they are still with breeder they should no longer be treated as part of a litter and should sleep alone in individual crates at night and all training and grooming sessions should be individual.
Introduce behavioral dominance exercises. "Alphabetize" yourself and your family --- feed pup after you eat, move crate to different locations so pup doesn't become site protective, take food and toys away from pup while eating or playing.
Continue socialization and obedience training providing slight distractions. Teach The Recall and Practice it Several Times Every Single Day!!! Do this before pup enters the "flight period" at about 16 weeks. |
Breeder Don't's: |
No tug-of-war games. Do not allow pup to sleep in bed with
humans. Absolutely forbid all chasing games with children. |
NOTE: Very, very important!
Do Not Raise Litter Mates or
Two Unrelated Puppies Together During This Period.
They will continue to bond to each other rather than you, if not careful.
Sixth Period - 4 to 6 months.
Characteristics: The flight period, corresponds to teething. Pups begin testing limits. May attempt to assert dominance over human pack members (especially children). May "forget" housebreaking.
Breeder Do's: |
Keep pup on lead when outside fenced enclosures. Continue recall training and response to commands. Continue dominance exercises and handling all parts of pups body. |
Breeder Don't's: |
Do not let pup off lead if at all possible. Do not chase pup or play
chasing games. |
Second Fear Imprint Period - 6 to 14 months.
Characteristics: Sexual maturity and hormonal changes. Fearfulness of new situations, objects, people, other dogs. Male dogs begin lifting legs. Some individuals will pass through this period faster than others, often with no noticeable problems. Others may display marked changes in behavior in strange situations.
Reinforce the behaviors you want; do not reinforce fearfulness by coddling or protective behavior. But also try to avoid punishing fearfulness. Try to adopt a firm but patient and kindly attitude to the pup's fearful behavior. Continue socialization to humans and other dogs. Avoid or postpone extremely stressful or traumatic experiences for animals that appear to be in this fear imprint period.
NOTE: This primer on critical stages of development is an attempt to consolidate information appearing in a variety of publications and from a number of authors, and to tailor that information specifically to the needs of breeders.
Remember that consistency and PRAISE are the key words here.
|
