EPR – Au Pays de Rattlousi 

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Statistics

Breeding statistics

Breeding activity period	2015–2025 (9 years, 8 months)

Declared litters	27 litters, 220 pups
⨽ internal (born in the rattery)	⨽ 27 litters, 220 pups
⨽ external (other contributed litters)	⨽ 0 litter, no pup

All rat records	220 rats
⨽ females	⨽ 135 females (61.4 %)
⨽ males	⨽ 85 males (38.6 %)

Litter statistics

Average mother age	191 days (6.3 months)
Average father age	339 days (11.1 months)
Average litter size	8.1 pups per litter
Average sex ratio	0.63 (about 8 females for 5 males)

Lifespan statistics

Bred rats recorded as deceased	181 rats (82.3 % of recorded bred rats)
⨽ declared with known date	⨽ 136 rats (75.1 %)
⨽ presumed dead	⨽ 45 rats (24.9 %)

Average lifespan of bred rats	21.8 months (♀: 21.7 months – ♂: 21.9 months)
⨽ infant mortality excluded	⨽ 22.5 months (♀: 22.9 months – ♂: 21.9 months)
⨽ accidents excluded	⨽ 23.3 months (♀: 23.8 months – ♂: 22.7 months)

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

Death causes statistics

Primary death causes by decreasing frequency

33.09 %	Other
21.32 %	Old age, natural death (from 24 month old minimum)
15.44 %	Unknown cause
8.09 %	Respiratory
6.62 %	Accidents, traumas, poisonings
3.68 %	Neurological (brain, spinal cords, nerves)
3.68 %	Eye, ear, mouth, face
2.94 %	Infant mortality (up to 6 week old)
2.21 %	Urinary system (kidney, bladder)
0.74 %	Digestive
0.74 %	Cardiovascular
0.74 %	Reproductive system
0.74 %	Muscles and skeleton

Secondary death causes by decreasing frequency

21.32 %	*Old age, natural death (from 24 month old minimum)
16.91 %	Undetermined tumor (affected organ unknown)
15.44 %	Undetermined cause (known date)
10.29 %	*Other
3.68 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
3.68 %	*Respiratory
2.94 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
2.94 %	Bronchitis, pneumonia
2.21 %	Stroke
2.21 %	*Infant mortality (up to 6 week old)
1.47 %	Dental malocclusion
1.47 %	Generalized cancer, leukemia, lymphoma
1.47 %	Renal failure
1.47 %	Domestic accident (crush, door...)
1.47 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.47 %	Undetermined infection or abscess
0.74 %	Brain tumor
0.74 %	Lung tumor
0.74 %	Other respiratory trouble
0.74 %	Tooth abscess
0.74 %	Stillborn
0.74 %	Muscle tumor
0.74 %	Intestinal obstruction (excluding megacolon)
0.74 %	Other head or neck related trouble
0.74 %	Heart failure, valvular disease
0.74 %	Uterus infection (metritis, pyometra)
0.74 %	Pituitary tumor
0.74 %	*Urinary system (kidney, bladder)
0.74 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	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
✓	23/11/2019	EPR Moana	EPR-NMS Karadoc	15
✓	09/08/2019	RB. Surprise	RB. Nardole	8
✓	19/05/2019	NMS-DTC Octavia	ETR Helvede	14

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	EPR61020F	EPR	Sata		29/01/2025	2 mo	– alive –	♀
✓	EPR61019F	EPR	Pamcha		29/01/2025	2 mo	– alive –	♀
✓	EPR61017F	EPR	Lina		29/01/2025	2 mo	– alive –	♀
✓	EPR61016F	EPR	Eka		29/01/2025	2 mo	– alive –	♀
✓	EPR61021M	EPR	Do		29/01/2025	2 mo	– alive –	♂
✓	EPR61018F	EPR	Chara		29/01/2025	2 mo	– alive –	♀
✓	EPR61022M	EPR	Chah		29/01/2025	2 mo	– alive –	♂
✓	EPR61152F	EPR	Atha		29/01/2025	2 mo	– alive –	♀
✓	EPR61153F	EPR	Dasa		29/01/2025	2 mo	– alive –	♀
✓	EPR61154M	EPR	Nai		29/01/2025	2 mo	– alive –	♂