Jack Russell Terrier: a legal digging area channels terrier persistence into an allowed outlet.
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Jack Russell Terrier: a legal digging area channels terrier persistence into an allowed outlet.
Breed profile
Training group
Terriers
Origin
The Jack Russell Terrier originated in England as an earth-working terrier used to pursue quarry underground.
Height at shoulder
25–30 cm
Common weight range
6–8 kg
Coat
Short or rough coat
Coat
Short or rough coat
Coat care
Condition calm acceptance of brushing, body checks and paw handling, using tools suited to the individual coat.
Drive keywords
Small-animal hunting · Digging · Chasing
Handling practice
Calm, gradual brushing and coat checks for the individual short or rough coat. · Voluntary paw, toe-space, ear and whole-body checks after digging or outdoor activity.
General reference ranges only; individual dogs vary substantially
05
Development has a clock
The 8–16 week window
Between eight and sixteen weeks, the puppy is learning what is safe, ordinary and worth avoiding.
You cannot pause this developmental period. The goal is not maximum exposure; it is carefully controlled experience at an intensity the puppy can process.
Development timeline
0–3 weeksNeonatal period
Basic sensory and physical development.
3–8 weeksDog-to-dog socialisation
Early dog-to-dog learning begins with littermates and stable adult dogs and continues after the puppy goes home.
8–16 weeksHuman and environmental socialisation sensitive period
Build calm, positive or neutral associations with ordinary life.
About 8–11 weeksFirst fear period
One intense fright can create a durable fear memory.
4–6 monthsTeething
Chewing needs increase as adult teeth replace puppy teeth.
6–12 monthsAdolescence
Expect a second fear period and a temporary “selective hearing” phase.
Sleep requirement
18–20 hours every day at eight weeks
Sleep loss often intensifies frantic biting, zooming and difficulty settling. Use scheduled, protected naps; see Chapters 7 and 19.
Attention span
2–3 minutes, 4–6 times a day
Several tiny successful sessions teach more than one exhausted 30-minute session.
Training with FluffyWA
Day school, board & train and private sessions are quoted after a chat, and boarding or daycare can be booked online with live prices.
