
🐹 Guinea pig · size Medium
Rex
Sociable and expressive guinea pig.
Photo · Wikimedia (CC BY-SA 4.0)

Weight
0.8–1.4 kg
Size
Medium
Lifespan
6–8 ans
Energy
Moyen
Maintenance
Faible
Training
Faible
The rex rabbit exhibits a phenotypic characteristic resulting in a coat variation in the domestic rabbit (Oryctolagus cuniculus). This characteristic stems from a spontaneous genetic mutation which, unlike the Angora rabbit, gives individuals a fuzzy, very dense and short coat resembling velvet, composed entirely of fine down 16 to 20 mm high. Since 1929, the rex rabbit has been an official French breed presenting this characteristic.
Compatibility
Profile
At a glance
Energy
Modéré
Trainability
Faible
Maintenance
Faible
Indicative profile — every animal is an individual.
⚡ Key facts in 30 seconds
L'essentiel
- 1Medium size (0.8–1.4 kg) — balance between presence and practicality.
- 2Life expectancy: 6 to 8 years on average, depending on maintenance and diet.
- 3Moderate energy — 30 to 60 minutes of exercise per day is sufficient.
- 4Minimal maintenance — little shedding, occasional brushing.
Chapter 1
Getting to know the Rex
Physical
Breed standard
Castorrex, the original large breed Rex rabbit, the large breed in various approved colorings Rex lop, variation with long lop ears Small rex, intermediate size between the large breed and its dwarf variant Dwarf rex, dwarf variation Dwarf lop rex, dwarf variation with lop ears
What if you adopted your future companion?
The Rex of your dreams may already be waiting in a shelter. Hundreds of rex (and equally wonderful crossbreeds) are looking for a family in France — every adoption starts a new story.
Editorial recommendation — no affiliate links.
Âge
What human age for a rex ?
The calculator is already set to the breed's adult size (espérance de vie 6–8 ans). Drag the slider to see the equivalence and corresponding life stage.
Equivalent human age
45years
Mature
Metabolism slows down. Monitor weight and early signs of joint stiffness, and have teeth checked.
Estimate: Proportional estimate: a reference life expectancy of 6 years, scaled to an 80-year human life. No reference veterinary table exists for this species.
These equivalences are statistical benchmarks drawn from published veterinary tables. Every animal ages at its own pace, depending on genetics, diet and care. This calculator is neither a diagnosis nor veterinary advice.
Alert
To avoid for guinea pig
Our database lists toxic ingredients and problematic additives by species.
- PotatoModerate
- caffeineLow
- titanium dioxideHigh
- rhubarbHigh
Calculator · daily ration
How much to give a rex ?
Estimate based on the veterinary formula RER × DER, adjusted for guinea pig. Adjust according to package recommendations.
Result
22 g
per day · 83 kcal
11 g / repas (2 par jour)
Calculation for food of 380 kcal/100g.
Appears in
Rex in our rankings
FAQ
Frequently asked questions about Rex
How long does a Rex live?+
Can a Rex live in an apartment?+
Is the Rex suitable for children?+
If you like this guinea pig
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For more information
Sources & official links
Supplementary documentation on reference sites — breed clubs, encyclopedias, veterinarians.
The right score for your Rex.
SokoScan calculates a personalized PawScore based on breed, age, weight and your pet's sensitivities. Free, instant.