A guide for puppy owners who want to understand what genetics can tell us — and what it can’t.

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Cockapoos are loved for their friendly temperaments, intelligence, and charming appearance. Their wide range of coat colours and patterns, combined with the low-shedding traits often inherited from Poodles*, make them especially appealing. Behind these visible traits lies a fascinating and well-understood system of genetics, which also plays an important role in inherited health conditions.

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This guide explains how coat colour and pattern inheritance works in Cockapoos and outlines the health screening that responsible breeders use to minimise genetic risk.

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* No breeder can guarantee that a dog will not trigger allergies. Low-shedding breeds typically produce less hair and dander, which may reduce allergic reactions for some people.

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Basic Genetics Terms (Plain English)

• Locus (plural: loci): The location of a gene on a chromosome

• Allele: A version of a gene; one inherited from each parent

• Dominant allele: Will be expressed if only one copy is present

• Recessive allele: Will be expressed only when two copies are present

• Homozygous: Two identical alleles at a locus - one from each parent

• Heterozygous: Two different alleles at a locus - one from each parent

• Autosomal recessive disorder: Requires two faulty copies, one from each parent, to cause disease; carriers are healthy

• Eumelanin: Black or brown pigment

• Phaeomelanin: Red, yellow, or cream pigment

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Understanding Probability (Important!)

When we say a litter has, for example, a 50% chance of sable, that does not mean half of every litter must be sable. It means each puppy independently has a 50% probability.

Just like tossing a coin:

• You might get heads and tails evenly

• Or several heads in a row

 

In Rudy and Caramel’s first litter:

• 50% probability of sable per puppy → exactly half were sable

• 25% probability of the Parti allele per puppy → 4 of 6 inherited it

• Both of these outcomes are within normal statistical variance.

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Key Coat Colour Loci in Rudy × Caramel Puppies

E-Locus (Extension Locus)

Determines whether black/brown pigment can appear at all.

• E: Normal pigment expression

• eh: Cocker Sable (shaded red that fades with age)

• e: Recessive red/apricot (overrides most other colour genes when homozygous e/e or e/eh)

 

The Parents are:

• Caramel: e/e → apricot

• Rudy: e/eh → red sable

 

Their Puppys' Possibilities are:

• 50% e/e → apricot

• 50% e/eh → red sable

 

Because both parents carry two copies of recessive red, all puppies will be red-based (apricot or sable). No true black or true chocolate base coat puppies are possible. The sable puppies may appear chocolate or black at birth, but only the tips of their hair are coloured, while the base will be apricot.

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A-Locus (Agouti Locus)

Controls patterning only if the E-Locus allows eumelanin expression

• at/at: Tan points - Rudy x Caramel pups have tan points, but they only show on sable pups

• ay/ay: Shaded sable (not possible here)

• a/a: Recessive black (not possible here)

Parents

• Caramel: at/at (hidden under apricot)

• Rudy: at/at (visible on sable)

Puppies

• All puppies carry tan points

• Tan points may only be visible on some sable puppies

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K-Locus (Dominant Black Locus)

• KB: Dominant black

• kbr: Brindle

• ky: Allows red/yellow pigment

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Although Caramel carries kbr, the E-Locus overrides the K-Locus since all Rudy x Caramel pups will be recessive red or red sable.

Result: no solid black puppies. Some sable puppies may show darker tips.

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B-Locus (Brown / Chocolate Locus)

Determines eumelanin colour (coat, nose, paw pads, lips, eye rims).

• B: Black pigment

• b/b: Chocolate pigment

 

Parents carry:

• Both are B/b

 

Puppies

• ~25% b/b → chocolate pigment, but recessive red at E-locus dominates

• Chocolate may appear subtly in red-based coats (often called “phantom chocolate”)

• We believe that Pup 1 in Litter 1 carries the chocolate allele at his B locus, which made his sable coat chocolate as a puppy and gave him hazel eyes and a chocolate nose and paw pads.

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D-Locus (Dilution Locus)

• D/D or D/d: No dilution

• d/d: Diluted colours (blue or lilac) - this is very common in Weimaraner dogs and rare in Cockapoos

Caramel is D/D, so no diluted puppies are possible.

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Merle

• n/n: No merle

• One copy: Merle pattern

• Two copies: Serious health risks

Caramel is n/n, so she cannot produce merle puppies.
Rudy has never produced merle except when bred to a known merle carrier, confirming by inference that he does not carry merle.

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S-Locus (White / Parti Markings)

• S/S or S/s: Solid coat or small white patches

• s/s: Mostly white

 

Parents are:

• Caramel: S/S

• Rudy: S/s

 

Puppy Probabilities are:

• ~25% chance per puppy of small white markings

• 4 of 6 puppies in the first litter inherited this allele, which exceeded the 25% probability

 

Furnishings (Facial Hair)

• F/F: Fully furnished

• f/f: Minimal facial hair

 

Both parents appear F/F, so all puppies are fully furnished. Furnishings are the long hair on the side of a Cockapoos nose (beardlike), which give them their gorgeous appearance.

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Summary: Expected Puppy Traits for Litter Two

• Apricot: ~50%

• Sable: ~50%

• Chocolate pigment: ~25%

• Tan point carriers: 100%

• White markings: ~25%

• Dilution: None

• Merle: None

• Furnishings: 100%

 

This genetic framework allows us to infer which alleles a puppy carries based on appearance and known parental genetics. Buyers will receive a chart with details of the known and inferred alleles of their puppy at each loci.

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Health Testing & Genetic Safety

Responsible breeders use DNA testing to reduce inherited disease risk.

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Test Results Explained

• Clear: Cannot develop or pass on the disorder

• Carrier: Healthy; can pass one copy

• Affected: Two copies; disease likely - this outcome is not possible with Rudy and Caramel, since Rudy is clear of all 8 disorders

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Eight Disorders Screened in Cockapoos

From Cocker Spaniels only

1. Acral Mutilation Syndrome (AMS)

2. Exercise-Induced Collapse (EIC)

3. Familial Nephropathy (FN)

4. Phosphofructokinase Deficiency (PFKD)

Shared by both breeds

5. Progressive Retinal Atrophy (PRA-PRCD)

6. Degenerative Myelopathy

From Poodles only

7. Neonatal Encephalopathy with Seizures (NEwS)

8. Von Willebrand’s Disease Type 1

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Caramel is clear of seven and is a carrier for PRA-PRCD only.

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Because PRA-PRCD is autosomal recessive and Rudy carries zero copies of this allele, none of our puppies can be affected, though ~50% may be healthy carriers. If you plan to breed from one of Caramel's puppies, please discuss this with Mike.

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Hybrid Vigour & Inbreeding

• Hybrid vigour: Greater genetic diversity reduces the chance of inherited disorders and often improves overall health and longevity

• Inbreeding: Increases the likelihood of recessive disease expression

 

A five-generation pedigree analysis of Rudy and Caramel shows a Coefficient of Inbreeding (COI) of 0%.

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Conclusion

DNA health testing, careful pairing, and an understanding of genetics allow breeders to produce healthy Cockapoos while preserving diversity and transparency. For owners who are interested, coat colour genetics also offers an enjoyable insight into how each puppy inherited its unique combination of traits.