Cocker Spaniel Shih Tzu Mix: The Complete Cock-A-Tzu Breed Guide

The Cocker Spaniel Shih Tzu mix — often called the Cock-A-Tzu — is a small designer crossbreed that blends the merry, outgoing nature of the Cocker Spaniel with the affectionate, lap-loving personality of the Shih Tzu. Standing roughly 10–15 inches tall and weighing between 12–25 pounds, this mix fits squarely into the "companion dog" category and has been quietly gaining popularity among apartment dwellers and families looking for a moderate-energy, people-oriented pet.

But designer mixes come with real variability. You won't know exactly which parent your puppy favors until they mature. This guide breaks down what you can reasonably expect — and what might surprise you — so you can decide whether the Cock-A-Tzu is the right addition to your household.

Parent Breed Breakdown: Cocker Spaniel Meets Shih Tzu

Understanding a mixed breed starts with understanding its parents. The Cock-A-Tzu inherits traits from two very different lineages — one a sporting dog bred for flushing game birds, the other an ancient companion breed developed for Chinese royalty.

Parent Breed Comparison

Trait	Cocker Spaniel (American)	Shih Tzu
AKC Group	Sporting	Toy
Weight Range	20–30 lb (9–14 kg)	9–16 lb (4–7 kg)
Height	13.5–15.5 in (34–39 cm)	9–10.5 in (23–27 cm)
Coat	Medium-long, silky or slightly wavy	Long, dense, double coat
Shedding	Moderate	Low (hair, not fur)
Energy Level	Moderate to high	Low to moderate
Lifespan	10–14 years	10–18 years
Original Purpose	Bird hunting / flushing	Companion / lap dog
Temperament	Merry, outgoing, trainable	Affectionate, confident, sometimes stubborn

The American Kennel Club's Cocker Spaniel profile describes the breed as the smallest member of the Sporting Group, while the AKC Shih Tzu standard emphasizes the breed's ancient lineage as a palace companion. These two very different histories create a mix that can lean strongly in either direction depending on the individual puppy.

How Big Will a Cocker Spaniel Shih Tzu Mix Get?

Because the parent breeds differ significantly in size, the Cock-A-Tzu's adult size carries a wider range than purebred dogs. Here's what most owners can expect:

Cock-A-Tzu Size Range Estimates

Measurement	Small End	Average	Large End
Weight	12 lb (5.4 kg)	16–18 lb (7–8 kg)	25 lb (11 kg)
Height at Withers	10 in (25 cm)	12–13 in (30–33 cm)	15 in (38 cm)
Body Length	14 in (36 cm)	17–19 in (43–48 cm)	22 in (56 cm)

What influences size: Puppies that inherit more Shih Tzu genetics will cluster around 12–16 lb, while those favoring the Cocker Spaniel parent may reach 20–25 lb. The dam's size during pregnancy also plays a role — a larger Cocker Spaniel mother typically produces larger puppies than a Shih Tzu dam carrying the same cross. Most Cock-A-Tzus reach their full adult size by 10–12 months of age, though they may continue filling out until 18 months.

Temperament: What Personality Can You Expect?

The Cock-A-Tzu's temperament sits on a spectrum between the Cocker Spaniel's eager-to-please enthusiasm and the Shih Tzu's dignified independence. Here's how traits tend to manifest:

Best-Case Temperament Scenario

A well-socialized Cock-A-Tzu typically combines the Cocker Spaniel's friendliness with the Shih Tzu's calm, affectionate nature. Expect a dog that greets visitors warmly, enjoys cuddling on the couch, plays enthusiastically for 20–30 minutes before settling down, and gets along well with children who handle dogs gently. These dogs tend to form strong bonds with their primary person but remain sociable with the whole family.

Challenging Temperament Scenarios

Some Cock-A-Tzus inherit the Shih Tzu's stubborn streak, making training sessions frustrating for first-time owners. Others pick up the Cocker Spaniel's sensitivity and develop separation anxiety if left alone for more than 4–5 hours. A less common but possible outcome: a dog that combines the Shih Tzu's wariness of strangers with the Cocker Spaniel's tendency to bark — resulting in an alert dog that may be slow to warm up to new people.

Key temperament variables:

• Trainability: Ranges from eager (Cocker-dominant) to willful (Shih Tzu-dominant). Use positive reinforcement — food rewards work especially well since both parent breeds are food-motivated.
• Barking: Moderate to high. Both breeds have alert tendencies. Early training to manage barking is recommended.
• Prey drive: Low to moderate. Cocker Spaniel lineage may trigger chasing behavior toward squirrels or small animals on walks.
• Socialization needs: High during the 8–16 week critical window. Expose puppies to varied surfaces, sounds, people, and other dogs during this period.

Coat Types, Shedding, and Grooming Requirements

This is where the Cock-A-Tzu shows the most visible variation. Coat type depends entirely on which parent's genes dominate, and even puppies in the same F1 litter can have noticeably different coats.

Three Common Coat Outcomes

1. Shih Tzu-Dominant Coat: Long, straight or slightly wavy hair (not fur) that grows continuously. Minimal shedding but requires daily brushing and professional grooming every 4–6 weeks. This is the coat type people hope for when seeking a "low-shedding" mix.

2. Cocker Spaniel-Dominant Coat: Medium-length, silky fur with feathering on the ears, legs, and chest. Moderate shedding year-round with seasonal increases. Requires brushing 3–4 times per week and professional grooming every 6–8 weeks.

3. Blended Coat: A wavy, medium-to-long coat that combines characteristics of both parents. Moderate shedding with moderate grooming needs — brushing every other day and professional trims every 5–6 weeks.

Grooming Cost and Schedule

Regardless of coat type, budget for these recurring grooming expenses:

• Professional grooming: $50–$90 per session (varies by region and coat length)
• Frequency: Every 4–8 weeks depending on coat type
• Annual grooming cost: $400–$1,100
• Home supplies: Slicker brush ($12–$20), metal comb ($8–$15), detangling spray ($10–$18), dog-safe shampoo ($12–$25)

Ear care is critical. Both parent breeds have floppy, pendant ears that trap moisture and debris. Clean ears weekly with a veterinary-recommended ear cleanser. Cock-A-Tzus are prone to ear infections (otitis externa) — redness, odor, or head-shaking warrants a vet visit.

Health Considerations: Inherited Conditions and the Hybrid Vigor Reality

Let's address a common misconception first: hybrid vigor (heterosis) does not eliminate health risks. While crossbreeding can reduce the probability of certain recessive conditions that plague purebreds, a Cock-A-Tzu can inherit health issues from either parent breed. The Merck Veterinary Manual notes that mixed-breed dogs can carry the same genetic mutations as their purebred ancestors.

Conditions Inherited from the Cocker Spaniel Parent

• Progressive Retinal Atrophy (PRA): Gradual vision loss leading to blindness. DNA tests are available — ask breeders for OFA or Paw Print Genetics clearance.
• Hip Dysplasia: Malformation of the hip joint. Prevalence in Cocker Spaniels is approximately 6–8% per OFA data.
• Ear Infections (Otitis Externa): Chronic ear issues affect an estimated 40–50% of Cocker Spaniels at some point.
• Autoimmune Hemolytic Anemia (AIHA): Immune system attacks red blood cells. Less common but serious.

Conditions Inherited from the Shih Tzu Parent

• Brachycephalic Obstructive Airway Syndrome (BOAS): If the Cock-A-Tzu inherits a shorter muzzle, breathing difficulties can arise — especially in heat or during exercise. BOAS is defined as a collection of upper airway abnormalities including stenotic nares, elongated soft palate, and everted laryngeal saccules.
• Intervertebral Disc Disease (IVDD): Disc degeneration that can cause pain, weakness, or paralysis. Shih Tzus carry elevated risk due to their chondrodystrophic body type.
• Patellar Luxation: Kneecap slipping out of position. Common in small breeds; severity ranges from Grade I (occasional skip) to Grade IV (permanent dislocation requiring surgery).
• Keratoconjunctivitis Sicca (Dry Eye): Insufficient tear production leading to corneal damage without treatment.

Conditions Both Parents Share

• Dental Disease: Small mouths crowd teeth, accelerating tartar buildup. Begin daily tooth brushing by 6 months of age. Budget for professional dental cleanings ($300–$700) starting around age 3–4.
• Obesity: Both breeds tend toward weight gain. Maintain a body condition score (BCS) of 4–5 out of 9.

Health testing to request from breeders: OFA hip evaluations, CERF/OFA eye exams, and PRA DNA testing for the Cocker Spaniel parent. Reputable breeders will provide documentation. Always consult your veterinarian about a screening schedule tailored to your individual dog.

Exercise, Training, and Daily Care

The Cock-A-Tzu's exercise needs fall in the moderate range — more active than a pure Shih Tzu but less demanding than a working-line Cocker Spaniel.

Daily Exercise Recommendations

• Walks: 25–40 minutes total per day, split into two outings
• Play sessions: 15–20 minutes of interactive play (fetch, tug, puzzle toys)
• Mental stimulation: Food puzzles, scent games, or short training sessions (5–10 minutes, 2–3 times daily)
• Off-leash time: Only in secure, fenced areas. The Cocker Spaniel's bird-chasing instinct can override recall training in open spaces.

Training Approach

Use positive reinforcement exclusively — reward-based methods using treats, praise, and play. The Shih Tzu's independence means patience is essential; a Cock-A-Tzu may not respond to a cue the first time, and that's normal. Keep sessions short (under 10 minutes) and end on a success.

Priority training goals for this mix:

1. Separation anxiety prevention: Begin crate training gradually at 8–10 weeks. Start with 2-minute absences and build duration over weeks, not days.
2. Barking management: Teach a "quiet" cue using counter-conditioning — reward silence after alert barking rather than punishing the bark itself.
3. Handling desensitization: Both breeds can be sensitive about paw and ear handling. Practice gentle touches paired with treats daily to make grooming and vet visits easier.
4. Recall: Train in low-distraction environments first. Use high-value treats (freeze-dried liver, boiled chicken) to compete with outdoor distractions.

How Much Does a Cocker Spaniel Shih Tzu Mix Cost?

Designer mix pricing varies widely based on breeder reputation, location, generation, and whether health testing was performed on the parent dogs.

Cock-A-Tzu Cost Breakdown

Source	Price Range	What's Typically Included
Responsible breeder (health-tested parents)	$800–$1,800	First vaccines, deworming, health guarantee, parent health clearances, microchip
Casual/backyard breeder	$300–$700	Variable — often no health testing or guarantees
Rescue / adoption	$150–$400	Spay/neuter, vaccines, microchip, sometimes behavioral assessment

First-year total cost estimate: Beyond the purchase price, budget approximately $1,500–$3,000 for first-year expenses including veterinary care (initial exam, vaccine series, spay/neuter at $200–$600), food ($240–$480 for a quality small-breed formula), grooming ($400–$1,100), supplies (crate, leash, harness, bowls: $150–$300), and pet insurance ($350–$600 annually for accident-and-illness coverage).

Finding a Cock-A-Tzu: Dedicated breeders of this specific cross are uncommon. Check the ASPCA adoption resources and local small-breed rescues — mixed-breed dogs from these parent breeds do end up in shelters. If pursuing a breeder, verify they perform OFA health testing on both parent dogs, allow you to meet the dam, offer a written health guarantee, and have a take-back clause if you can no longer keep the dog.

Who Is the Cock-A-Tzu Best Suited For?

This mix works best for specific household types. Here's a decision framework:

Ideal owners:

• Apartment or condo dwellers who want a small, moderate-energy companion
• Families with children ages 8+ who understand gentle dog handling (small dogs can be injured by rough play)
• Retirees or work-from-home owners who can provide companionship throughout the day
• First-time dog owners willing to invest in puppy socialization classes ($150–$300 for a 6-week course)
• Households with other dogs or cat-friendly introductions done gradually

Less ideal situations:

• Owners who work 10+ hour days away from home (separation anxiety risk)
• Households seeking an outdoor adventure dog for hiking or jogging (this mix overheats easily, especially if brachycephalic traits are inherited)
• People unwilling to commit to regular grooming appointments
• Families with toddlers who may accidentally drop or squeeze a 15-pound dog

Frequently Asked Questions

What two breeds make up the Cock-A-Tzu?

The Cock-A-Tzu is a cross between a Cocker Spaniel (typically the American Cocker Spaniel) and a Shih Tzu. Some breeders use the English Cocker Spaniel, which is slightly larger and produces a bigger mixed offspring.

How long do Cock-A-Tzus live?

Most Cock-A-Tzus live 12–15 years, with some reaching 16+ when maintained at a healthy weight and receiving regular veterinary care. Their lifespan tends to fall between the Cocker Spaniel's 10–14 years and the Shih Tzu's 10–18 years.

Are Cock-A-Tzus good with other pets?

Generally yes, especially when socialized early. The Cocker Spaniel's sporting background means some individuals may chase cats or small animals, but most Cock-A-Tzus coexist peacefully with household cats when introduced properly. Dog-to-dog sociability is usually good.

Do Cock-A-Tzus bark a lot?

They tend to be moderate barkers — alert enough to notify you of doorbell rings or approaching strangers, but not typically nuisance barkers if exercised and mentally stimulated. Consistent training from puppyhood keeps barking manageable.

Can Cock-A-Tzus be left alone?

Adult Cock-A-Tzus can typically handle 4–5 hours alone if properly crate-trained and exercised beforehand. Beyond that, separation anxiety behaviors (destructive chewing, excessive barking, house-soiling) may emerge. Doggy daycare or a midday walker is recommended for owners with longer workdays.

What should I feed a Cock-A-Tzu?

Choose an AAFCO-approved small-breed adult formula with a named protein source listed first. Most Cock-A-Tzus eat ¾ to 1¼ cups of dry kibble daily, split into two meals. Monitor body condition score monthly and adjust portions accordingly — this mix gains weight easily. Consult your veterinarian for specific dietary recommendations.