Owner Guides
Toller health conditions, explained for owners
Tollers are a generally healthy, long-lived sporting breed — but a small founding gene pool concentrated a handful of inherited conditions every owner and buyer should understand. This guide covers each one in plain language: what it is, what to watch for, and how testing prevents it.
Educational content, not veterinary advice — always consult your veterinarian. Part of our complete care guide.
- Addison's disease (adult & juvenile)
- Progressive retinal atrophy (PRA)
- Collie eye anomaly (CEA)
- Immune-mediated disease
- Hip dysplasia
Addison's disease: the one to know
Addison's disease (hypoadrenocorticism) is the Toller condition every owner should be able to recognize. The adrenal glands stop producing enough cortisol and aldosterone. In Tollers it occurs at many times the rate of the general dog population — studies put incidence around 1% or higher — and strikes young, with an average onset near 2–3 years versus 5+ in other breeds.
The hard part is that symptoms are vague and can come and go: lethargy, intermittent vomiting or diarrhea, poor appetite, weight loss, shaking. Routine bloodwork can look completely normal. The definitive test is an ACTH stimulation test — worth asking about by name if a young Toller has repeated unexplained "off" spells.
The good news: diagnosed and managed with replacement medication, Addisonian dogs typically live normal, active lives.
Call your vet if a young Toller shows
- Recurring lethargy or "just not right" days
- Intermittent vomiting/diarrhea with no clear cause
- Appetite loss and weight loss
- Collapse or severe weakness (emergency — possible Addisonian crisis)
Ask whether an ACTH stimulation test is warranted.
The inherited conditions, one by one
DNA testing: why this breed leans on it
Every Toller alive descends from a handful of Little River dogs that survived distemper outbreaks in the early 1900s — a genetic bottleneck that concentrated recessive conditions. The breed community's answer has been aggressive, transparent DNA screening. Laboratories such as the UC Davis Veterinary Genetics Laboratory offer breed panels covering PRA, CEA, JADD, CLPS, DEN, and more in one swab.
For buyers, the rule is simple: both parents tested, and no two carriers bred together. A carrier dog is a perfectly healthy pet — carriers only matter in breeding decisions. Our breeder guide covers exactly what paperwork to ask for.
Screening for owned dogs
- Annual vet exam; twice yearly from age 8
- Baseline bloodwork young — useful for comparison later
- Annual eye exam if from untested lines
- Weight tracked — lean dogs live longer
See our full health screening checklist.
Caring for a senior Toller
Most Tollers stay athletic well past ten. Senior care is about catching change early: twice-yearly exams with bloodwork, joint support as jumping slows, weight management as metabolism drops, and honest tracking of mobility, appetite, and comfort day to day.
A written record genuinely helps here — patterns of "off days" are what vets need to see. Our Senior Dog Health Journal was built for exactly this: medication logs, bloodwork records, 0–10 pain and mobility scoring, and the vet-developed HHHHHMM quality-of-life scale.
Senior watch list
- Stiffness after rest, reluctance on stairs
- New lumps — have every one checked
- Increased thirst or urination
- Coat changes, weight gain (thyroid)
- Confusion or restlessness at night
Buying a puppy?
The single biggest health decision is made before you bring the dog home: choosing tested parents.
Frequently asked questions
Are Tollers a healthy breed overall?
Yes — most live active 12–14 year lives. The breed's known conditions are either DNA-preventable or manageable when caught early, which is why screening matters so much.
How common is Addison's disease in Tollers?
Studies suggest around 1% or more of the breed — far above the general dog population — with younger onset. Managed with medication, affected dogs live normal lives.
Should I DNA test my pet Toller?
It's optional for a pet from tested parents. For dogs of unknown background, a breed panel is inexpensive insurance — knowing PRA status, for example, lets you prepare early.
Is a carrier dog unhealthy?
No. Carriers of recessive conditions are healthy pets. Carrier status only matters when choosing breeding pairs.
What should I track at home?
Weight, appetite, energy patterns, and anything intermittent. Vague, recurring "off days" in a young Toller deserve an Addison's conversation with your vet.
Related resources
Senior Dog Health Journal
Track medications, bloodwork, pain scores, and quality of life.
See the bookSources
Trusted references for breed health guidance.