EPR – Au Pays de Rattlousi 

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Statistics

Breeding statistics

Breeding activity period	2015–2026 (11 years)

Declared litters	30 litters, 253 pups
⨽ internal (born in the rattery)	⨽ 30 litters, 253 pups
⨽ external (other contributed litters)	⨽ 0 litter, no pup

All rat records	251 rats
⨽ females	⨽ 151 females (60.2 %)
⨽ males	⨽ 100 males (39.8 %)

Litter statistics

Average mother age	195 days (6.4 months)
Average father age	355 days (11.6 months)
Average litter size	8.4 pups per litter
Average sex ratio	0.662 (about 3 females for 2 males)

Lifespan statistics

Bred rats recorded as deceased	204 rats (81.3 % of recorded bred rats)
⨽ declared with known date	⨽ 159 rats (77.9 %)
⨽ presumed dead	⨽ 45 rats (22.1 %)

Average lifespan of bred rats	21.9 months (♀: 21.7 months – ♂: 22.1 months)
⨽ infant mortality excluded	⨽ 22.4 months (♀: 22.7 months – ♂: 22.1 months)
⨽ accidents excluded	⨽ 23.2 months (♀: 23.5 months – ♂: 22.8 months)

Oldest bred rat	EPR Pantalaimon (deceased at 3 years, 3 months, 10 days)

Death causes statistics

Primary death causes by decreasing frequency

30.19 %	Other
22.64 %	Old age, natural death (from 24 month old minimum)
15.09 %	Unknown cause
8.81 %	Respiratory
5.66 %	Neurological (brain, spinal cords, nerves)
5.66 %	Accidents, traumas, poisonings
4.4 %	Eye, ear, mouth, face
2.52 %	Urinary system (kidney, bladder)
2.52 %	Infant mortality (up to 6 week old)
0.63 %	Muscles and skeleton
0.63 %	Digestive
0.63 %	Cardiovascular
0.63 %	Reproductive system

Secondary death causes by decreasing frequency

22.64 %	*Old age, natural death (from 24 month old minimum)
15.09 %	Undetermined cause (known date)
14.47 %	Undetermined tumor (affected organ unknown)
8.81 %	*Other
3.77 %	*Respiratory
3.14 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
3.14 %	Bronchitis, pneumonia
2.52 %	Stroke
2.52 %	Pituitary tumor
2.52 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
2.52 %	Generalized cancer, leukemia, lymphoma
1.89 %	*Infant mortality (up to 6 week old)
1.26 %	Undetermined infection or abscess
1.26 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.26 %	Dental malocclusion
1.26 %	Renal failure
1.26 %	Other respiratory trouble
1.26 %	Domestic accident (crush, door...)
1.26 %	Zymbal gland tumor
0.63 %	Uterus infection (metritis, pyometra)
0.63 %	Other urinary disorder
0.63 %	Sepsis
0.63 %	Brain tumor
0.63 %	Lung tumor
0.63 %	Tooth abscess
0.63 %	Stillborn
0.63 %	Intestinal obstruction (excluding megacolon)
0.63 %	Muscle tumor
0.63 %	Heart failure, valvular disease
0.63 %	Other head or neck related trouble
0.63 %	*Urinary system (kidney, bladder)
0.63 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	07/06/2026	EPR Jenifael	EPR Maliketh	14
✓	08/12/2025	EPR Malenia	ARD Udachi	13
✓	24/05/2025	EPR Makalu	EPR Anathar	6
✓	29/01/2025	EPR Makalu	MIL Capitaine	10
✓	09/07/2024	ETR Nokstella	EPR-VIC Titi	14
✓	15/11/2023	MIL Sellen	EPR-VIC Sontar	12
✓	17/08/2022	LTE B'Queenie	EPR Koda	9
✓	17/06/2021	MIL Tempete	EPR Gribouille	9
✓	17/07/2020	EPR Kenya	MIL Fang Xin	11
✓	27/02/2020	EPR Vénus	EPR-NMS Perceval	14

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✗	EPR58788F	EPR	Chance †	Féca	15/11/2023	23 mo	Other known cause fitting no other category	♀
✗	EPR58794M	EPR	Tatouille †	Enutrof	15/11/2023	26 mo	Old age, natural death	♂
✓	EPR62474M	EPR	Icare	Psyllium	07/06/2026	3 mo	– alive –	♂
✓	EPR58795M	EPR	Vladimir †	Osamodas	15/11/2023	33 mo	Old age, natural death	♂
✓	EPR58797M	EPR	Bougri †	Xélor	15/11/2023	29 mo	Old age, natural death	♂
✓	EPR60173M	EPR	Horius †	Everest	09/07/2024	21 mo	Other respiratory trouble	♂
✓	EPR60169F	EPR	Manaslu †	Manaslu	09/07/2024	25 mo	Pituitary tumor	♀
✓	EPR60170F	EPR	Venise †	ChoOyu	09/07/2024	23 mo	Undetermined cause	♀
✓	EPR62472M	EPR	Maté		07/06/2026	3 mo	– alive –	♂
✓	EPR62473M	EPR	Millepertuis		07/06/2026	3 mo	– alive –	♂