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	253 rats
⨽ females	⨽ 152 females (60.1 %)
⨽ males	⨽ 101 males (39.9 %)

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	0.664 (about 3 females for 2 males)

Lifespan statistics

Bred rats recorded as deceased	206 rats (81.4 % of recorded bred rats)
⨽ declared with known date	⨽ 161 rats (78.2 %)
⨽ presumed dead	⨽ 45 rats (21.8 %)

Average lifespan of bred rats	21.9 months (♀: 21.7 months – ♂: 22.2 months)
⨽ infant mortality excluded	⨽ 22.5 months (♀: 22.7 months – ♂: 22.2 months)
⨽ accidents excluded	⨽ 23.2 months (♀: 23.5 months – ♂: 22.9 months)

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

Death causes statistics

Primary death causes by decreasing frequency

29.81 %	Other
22.36 %	Old age, natural death (from 24 month old minimum)
16.15 %	Unknown cause
8.7 %	Respiratory
5.59 %	Neurological (brain, spinal cords, nerves)
5.59 %	Accidents, traumas, poisonings
4.35 %	Eye, ear, mouth, face
2.48 %	Urinary system (kidney, bladder)
2.48 %	Infant mortality (up to 6 week old)
0.62 %	Digestive
0.62 %	Cardiovascular
0.62 %	Reproductive system
0.62 %	Muscles and skeleton

Secondary death causes by decreasing frequency

22.36 %	*Old age, natural death (from 24 month old minimum)
16.15 %	Undetermined cause (known date)
14.29 %	Undetermined tumor (affected organ unknown)
8.7 %	*Other
3.73 %	*Respiratory
3.11 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
3.11 %	Bronchitis, pneumonia
2.48 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
2.48 %	Generalized cancer, leukemia, lymphoma
2.48 %	Stroke
2.48 %	Pituitary tumor
1.86 %	*Infant mortality (up to 6 week old)
1.24 %	Dental malocclusion
1.24 %	Renal failure
1.24 %	Other respiratory trouble
1.24 %	Domestic accident (crush, door...)
1.24 %	Zymbal gland tumor
1.24 %	Undetermined infection or abscess
1.24 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
0.62 %	Sepsis
0.62 %	Brain tumor
0.62 %	Lung tumor
0.62 %	Tooth abscess
0.62 %	Stillborn
0.62 %	Intestinal obstruction (excluding megacolon)
0.62 %	Muscle tumor
0.62 %	Heart failure, valvular disease
0.62 %	Other head or neck related trouble
0.62 %	Uterus infection (metritis, pyometra)
0.62 %	Other urinary disorder
0.62 %	*Urinary system (kidney, bladder)
0.62 %	*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
✓	EPR58794M	EPR	Tatouille †	Enutrof	15/11/2023	26 mo	Undetermined cause	♂
✓	EPR62470M	EPR	Ginseng		07/06/2026	5 mo	– alive –	♂
✓	EPR62482M	EPR	Aloe		07/06/2026	5 mo	– alive –	♂
✓	EPR62479F	EPR	Mélisse		07/06/2026	5 mo	– alive –	♀
✓	EPR62480F	EPR	Passiflore		07/06/2026	5 mo	– alive –	♀
✓	EPR62478F	EPR	Gentiane		07/06/2026	5 mo	– alive –	♀
✓	EPR62481F	EPR	Sauge		07/06/2026	5 mo	– alive –	♀
✓	EPR58788F	EPR	Chance †	Féca	15/11/2023	23 mo	Undetermined cause	♀
✓	EPR62474M	EPR	Icare	Psyllium	07/06/2026	5 mo	– alive –	♂
✓	EPR58795M	EPR	Vladimir †	Osamodas	15/11/2023	33 mo	Old age, natural death	♂