Adopt vs ethical breeder vs pet shop — and 10 puppy-mill red flags

The question of where to get a dog is one of the most consequential decisions in the ownership journey, and one of the most misunderstood. Most people have heard "adopt don't shop" and most people have encountered a pet shop window. Fewer people know what a genuinely reputable breeder looks like in practice, or exactly what makes a puppy mill puppy's first weeks so harmful to its health and behaviour for the rest of its life.

This guide covers the honest trade-offs between each pathway, what a good breeder actually looks like (not just what they claim), and the ten red flags that tell you what you are really dealing with.

Adoption from a shelter: the case

Adoption from a reputable shelter is the most cost-effective, welfare-positive, and transparent option for most people who do not have a specific breed requirement. In Singapore, the main shelters — SOSD (Save our Street Dogs), SPCA Singapore, Causes for Animals, Action for Singapore Dogs (ASD), and others — assess dogs for temperament before adoption, vaccinate, microchip, and sterilise as part of the adoption fee, provide ongoing post-adoption support, and match dogs to households based on lifestyle fit.

• Pros: lowest cost; temperament assessed; vaccinated, microchipped, and sterilised typically included; ongoing support from the shelter; wide range of ages; you know what you are getting
• Cons: specific breed availability is limited; puppies are less common than adults; some rescue dogs have unknown early histories that require patient rehabilitation

An ethical breeder: the case and what it looks like

If you have a specific breed requirement — particularly for predictable working traits, size, or coat type — a reputable, ethical breeder is the right source. The word "reputable" is doing a lot of work in that sentence. A reputable breeder is identifiable by a specific set of behaviours, not by what they say on a website.

• Health tests: a reputable breeder health-tests breeding stock for the heritable conditions relevant to the breed (OFA/BVA hip scores, cardiac exams, DNA tests). Ask to see certificates.
• You can visit: a reputable breeder invites you to see the breeding environment and meet at least the dam (mother) in person, in the environment where the puppies were raised
• They ask about your lifestyle: a breeder who cares about where their puppies end up will ask about your housing, schedule, experience, and family
• They provide a contract and support: a written health guarantee, return policy (they take the dog back if you cannot keep it), and willingness to answer questions after the sale
• They are registered with the national kennel club where applicable, or can demonstrate ongoing involvement in breed clubs
• Waiting lists are normal: good breeders do not have puppies immediately available at all times

Pet shops: why the evidence points away from them

Pet shops sell puppies as a retail product. The fundamental commercial logic is to maximise turnover — which means sourcing puppies quickly, cheaply, and in volume. Most pet shops globally cannot guarantee the conditions in which their puppies were bred, because they are one or more steps removed from that source. The evidence on the health and behaviour outcomes of pet-shop puppies is consistent and troubling.

A 2011 study published in the Journal of Veterinary Behavior (McMillan et al.) found that dogs obtained from pet shops had significantly higher rates of aggression towards owners, strangers, and other dogs, and higher rates of separation anxiety and attachment-related behaviour problems, compared with dogs obtained from non-commercial breeders. The authors linked this to the removal from the litter and mother at or before 8 weeks in stressful, non-socialised conditions.

10 puppy-mill red flags

Puppy mills are large-scale commercial breeding operations that prioritise volume over animal welfare. They are not always visibly awful — some have professional-looking websites and clean-looking facilities. The red flags below apply to breeders, private sellers, online listings, and pet shops.

• Red flag 1: Multiple breeds available at the same time, or "always have puppies available." Reputable breeders produce one or two breeds and have waiting lists.
• Red flag 2: You cannot visit — the breeder offers delivery, meets in a car park, or says the mother is "away." This is a classic puppy-farm tactic.
• Red flag 3: No health certificates or no offer of health documentation when asked.
• Red flag 4: The puppy is offered at under 8 weeks of age. Legal minimum and welfare standard is 8 weeks; responsible breeders often keep puppies until 8–10 weeks.
• Red flag 5: Price pressure tactics — "this puppy has been reserved by someone else," "we only have one left," urgency language that creates impulsive decisions.
• Red flag 6: The seller does not ask about your lifestyle, experience, or living situation at all.
• Red flag 7: The dam is absent, aggressive, fearful, or obviously in poor condition when you visit.
• Red flag 8: The environment is dirty, crowded, or the puppies are kept in isolation from human contact.
• Red flag 9: No contract, no health guarantee, no return policy. A good breeder will take the dog back.
• Red flag 10: Payment required before visit, or the only photos are stock images from a breed website.

Singapore: licensed pet dealers and what to look for

In Singapore, pet shops and commercial breeders must hold a licence from NParks AVS. The AVS Animal & Veterinary Service maintains a public register of licensed pet dealers — you can verify a seller's licence at https://www.nparks.gov.sg/avs/pets/buying-and-selling-of-animals/pet-shop-licence. Licensing does not guarantee animal welfare standards equivalent to a reputable private breeder — it sets a legal minimum. When buying from a licensed dealer, the same red flags above apply. Ask for the AVS licence number, health certificates for the puppy, and documentation of the puppy's source.