Australian Shepherd vs Border Collie

Australian Shepherd

Border Collie

Australian Shepherd

• Good with children: Yes
• Good with other pets: No
• Apartment friendly: No
• Exercise: very high

Border Collie

• Good with children: Yes
• Good with other pets: No
• Apartment friendly: No
• Exercise: very high

Australian Shepherd

Exercise

very high

Grooming

moderate

Shedding

high

Border Collie

Exercise

very high

Grooming

moderate

Shedding

high

Australian Shepherd

Life span: 12–15 yrs

• MDR1 (multidrug resistance 1) gene mutation — a high-frequency inherited defect in the blood-brain barrier transporter that causes severe, sometimes fatal neurotoxic reactions to ordinary doses of common drugs including ivermectin, loperamide, and certain anaesthetics and chemotherapy agents. A ~$50 cheek-swab DNA test gives the dog's lifetime status; every Aussie owner should know it before any veterinary treatment.
• Collie eye anomaly (CEA) — an inherited developmental defect of the retina, choroid and optic disc present at birth, ranging from mild to sight-threatening; a DNA test exists and both parents should be screened before breeding.
• Hip dysplasia — a malformed hip joint causing laxity, arthritis and pain; risk is reduced (not eliminated) by OFA/PennHIP-screened parents and lifelong lean body condition.
• Idiopathic epilepsy — recurrent seizures with no identifiable structural cause, typically first appearing between 6 months and 5 years; manageable with lifelong anticonvulsant medication and committed monitoring, but a real ongoing cost.
• Cataracts (including hereditary cataract) — clouding of the lens that can progress to vision loss; relatively common in the breed and a reason for routine ophthalmic screening of breeding dogs.
• Double-merle / merle-to-merle breeding defects — when two merle-coated dogs are bred together, a proportion of puppies are 'double merle' with congenital deafness and/or serious eye defects including blindness; this is preventable and is a direct reason to know a breeder's colour-pairing practices.
• High exercise and work-drive deficit — not a disease but the breed's defining failure mode: an under-stimulated Australian Shepherd reliably develops anxiety, hyper-vigilance, compulsive herding/nipping and destructiveness. The drive that makes it an elite working and sport dog is the same trait that makes it unlivable in a low-activity home — a non-negotiable trade-off.

Border Collie

Life span: 12–15 yrs

• Collie eye anomaly (CEA) — an inherited developmental defect of the eye affecting the retina, choroid and optic disc, present at birth and ranging from mild (vision unaffected) to severe (retinal detachment and blindness). A DNA test exists; both parents should be tested before breeding.
• MDR1 (multidrug resistance 1) gene mutation — a genetic defect in the blood-brain barrier transporter that causes severe, sometimes fatal neurotoxic reactions to ordinary doses of common drugs including ivermectin, loperamide, and certain anesthetics and chemotherapy agents. A ~$50 cheek-swab DNA test identifies affected dogs; every Border Collie owner should know the dog's MDR1 status before any vet treatment.
• Hip dysplasia — a malformed hip joint leading to laxity, arthritis, pain and reduced mobility; risk is reduced (not eliminated) by buying from OFA/PennHIP-screened parents and keeping the dog lean.
• Idiopathic epilepsy — recurrent seizures with no identifiable structural cause, typically first appearing between 6 months and 5 years; manageable lifelong with anticonvulsant medication but requires committed monitoring and ongoing cost.
• Neuronal ceroid lipofuscinosis (NCL) — a fatal inherited neurodegenerative storage disease causing progressive loss of vision, coordination and cognition in young dogs; uniformly fatal, but a DNA test lets breeders avoid producing affected puppies entirely.
• Trapped neutrophil syndrome (TNS) — an inherited immune-deficiency disease where neutrophils are produced but trapped in the bone marrow, leaving puppies unable to fight infection; fatal in early life, fully preventable through DNA testing of breeding stock.
• Exercise and mental-stimulation deficit — not a disease but the breed's defining failure mode: an under-worked Border Collie reliably develops compulsive behaviors (spinning, light-chasing, flank-biting), anxiety and destructiveness. The 'trade-off' is real and non-negotiable — the intelligence that makes the breed exceptional is the same trait that makes it unlivable in the wrong home.