EPR – Au Pays de Rattlousi 

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Statistics

Breeding statistics

Breeding activity period	2015–2025 (10 years)

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	225 rats
⨽ females	⨽ 138 females (61.3 %)
⨽ males	⨽ 87 males (38.7 %)

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	185 rats (82.2 % of recorded bred rats)
⨽ declared with known date	⨽ 140 rats (75.7 %)
⨽ presumed dead	⨽ 45 rats (24.3 %)

Average lifespan of bred rats	21.9 months (♀: 21.8 months – ♂: 22.1 months)
⨽ infant mortality excluded	⨽ 22.6 months (♀: 22.9 months – ♂: 22.1 months)
⨽ accidents excluded	⨽ 23.4 months (♀: 23.8 months – ♂: 23 months)

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

Death causes statistics

Primary death causes by decreasing frequency

32.14 %	Other
22.14 %	Old age, natural death (from 24 month old minimum)
15 %	Unknown cause
7.86 %	Respiratory
6.43 %	Accidents, traumas, poisonings
4.29 %	Neurological (brain, spinal cords, nerves)
4.29 %	Eye, ear, mouth, face
2.86 %	Infant mortality (up to 6 week old)
2.14 %	Urinary system (kidney, bladder)
0.71 %	Digestive
0.71 %	Cardiovascular
0.71 %	Reproductive system
0.71 %	Muscles and skeleton

Secondary death causes by decreasing frequency

22.14 %	*Old age, natural death (from 24 month old minimum)
16.43 %	Undetermined tumor (affected organ unknown)
15 %	Undetermined cause (known date)
10 %	*Other
3.57 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
3.57 %	*Respiratory
2.86 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
2.86 %	Bronchitis, pneumonia
2.14 %	Stroke
2.14 %	*Infant mortality (up to 6 week old)
1.43 %	Pituitary tumor
1.43 %	Dental malocclusion
1.43 %	Generalized cancer, leukemia, lymphoma
1.43 %	Renal failure
1.43 %	Domestic accident (crush, door...)
1.43 %	Undetermined infection or abscess
1.43 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
0.71 %	Brain tumor
0.71 %	Lung tumor
0.71 %	Other respiratory trouble
0.71 %	Tooth abscess
0.71 %	Stillborn
0.71 %	Zymbal gland tumor
0.71 %	Intestinal obstruction (excluding megacolon)
0.71 %	Muscle tumor
0.71 %	Heart failure, valvular disease
0.71 %	Other head or neck related trouble
0.71 %	Uterus infection (metritis, pyometra)
0.71 %	*Urinary system (kidney, bladder)
0.71 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	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
✓	23/11/2019	EPR Moana	EPR-NMS Karadoc	15
✓	09/08/2019	RB. Surprise	RB. Nardole	8

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	EPR61017F	EPR	Lina		29/01/2025	5 mo	– alive –	♀
✓	EPR61018F	EPR	Chara		29/01/2025	5 mo	– alive –	♀
✓	EPR57390M	EPR-VIC	Titi †	Krop Tor	17/08/2022	34 mo	Old age, natural death	♂
✓	EPR58789F	EPR	Esperance †	Sacrieur	15/11/2023	19 mo	Pituitary tumor	♀
✗	EPR58787F	EPR	Clervie †	Eniripsa	15/11/2023	18 mo	Respiratory	♀
✓	EPR61523F	EPR	Trina		24/05/2025	1 mo	– alive –	♀
✓	EPR61525M	EPR	Radagon		24/05/2025	1 mo	– alive –	♂
✓	EPR61524M	EPR	Maliketh		24/05/2025	1 mo	– alive –	♂
✓	EPR61522F	EPR	Ranni		24/05/2025	1 mo	– alive –	♀
✓	EPR61521F	EPR	Rennala		24/05/2025	1 mo	– alive –	♀