Australian Cattle Dog vs German Shepherd Dog

Australian Cattle Dog vs German Shepherd Dog — ageing curve, human-year equivalent, senior life stage and expected lifespan, using The Royal Kennel Club's size-adjusted guidance.

Pick from 225+ Royal Kennel Club-recognised breeds.

Pick from 225+ Royal Kennel Club-recognised breeds.

Ageing curve — human years by dog age
0481216 yrs
— Australian Cattle Dog (Medium) — German Shepherd Dog (Large)
Medium
Size band
Large
7 yrs
Senior from
5 yrs
Lifespan (yrs)
~11.3
Australian Cattle Dog and German Shepherd Dog are in different size bands, so they age at different rates — see the curve above.
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Australian Cattle Dog

Medium breed · becomes a senior around age 7

Full Australian Cattle Dog age guide →

German Shepherd Dog

Large breed · becomes a senior around age 5

Average lifespan: 11.3 years (Dogs Trust, 2024 UK veterinary records)

Full German Shepherd Dog age guide →

Australian Cattle Dog is a medium breed and German Shepherd Dog is a large breed, so they follow different Royal Kennel Club ageing curves — see the table below for how their human-year equivalents diverge over time.

Dog yearsAustralian Cattle DogGerman Shepherd Dog
11515
22424
32828
43232
53636
64245
74750
85155
95661
106066
116572
126977
137482
147888
158393
168799

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How this comparison works

The Royal Kennel Club's ageing guidance is size-based, not breed-based: every breed is assigned to one of four size bands (small, medium, large, giant), and all dogs within the same band age at the same rate. So two breeds in the same size band — a Labrador Retriever and a Golden Retriever, for example — follow an identical dog-years-to-human-years curve. The meaningful differences between same-band breeds are things like expected lifespan and typical health concerns, not the year-by-year conversion itself. Breeds in different size bands follow different curves — see the table above once you've picked two breeds.

Don't see the breed you're after? The calculator covers over 225 Royal Kennel Club-recognised breeds, and the guides hub has in-depth ageing charts for ten popular breeds.

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