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	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	183 rats (83.2 % of recorded bred rats)
⨽ declared with known date	⨽ 138 rats (75.4 %)
⨽ presumed dead	⨽ 45 rats (24.6 %)

Average lifespan of bred rats	21.9 months (♀: 21.8 months – ♂: 21.9 months)
⨽ infant mortality excluded	⨽ 22.5 months (♀: 23 months – ♂: 21.9 months)
⨽ accidents excluded	⨽ 23.4 months (♀: 23.9 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

32.61 %	Other
21.74 %	Old age, natural death (from 24 month old minimum)
15.22 %	Unknown cause
7.97 %	Respiratory
6.52 %	Accidents, traumas, poisonings
4.35 %	Eye, ear, mouth, face
3.62 %	Neurological (brain, spinal cords, nerves)
2.9 %	Infant mortality (up to 6 week old)
2.17 %	Urinary system (kidney, bladder)
0.72 %	Digestive
0.72 %	Cardiovascular
0.72 %	Reproductive system
0.72 %	Muscles and skeleton

Secondary death causes by decreasing frequency

21.74 %	*Old age, natural death (from 24 month old minimum)
16.67 %	Undetermined tumor (affected organ unknown)
15.22 %	Undetermined cause (known date)
10.14 %	*Other
3.62 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
3.62 %	*Respiratory
2.9 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
2.9 %	Bronchitis, pneumonia
2.17 %	Stroke
2.17 %	*Infant mortality (up to 6 week old)
1.45 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.45 %	Dental malocclusion
1.45 %	Generalized cancer, leukemia, lymphoma
1.45 %	Renal failure
1.45 %	Domestic accident (crush, door...)
1.45 %	Undetermined infection or abscess
0.72 %	Uterus infection (metritis, pyometra)
0.72 %	Pituitary tumor
0.72 %	Brain tumor
0.72 %	Lung tumor
0.72 %	Other respiratory trouble
0.72 %	Tooth abscess
0.72 %	Stillborn
0.72 %	Zymbal gland tumor
0.72 %	Intestinal obstruction (excluding megacolon)
0.72 %	Muscle tumor
0.72 %	Heart failure, valvular disease
0.72 %	Other head or neck related trouble
0.72 %	*Urinary system (kidney, bladder)
0.72 %	*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
✓	EPR61152F	EPR	Diva	Atha	29/01/2025	4 mo	– alive –	♀
✓	EPR61018F	EPR	Chara		29/01/2025	4 mo	– alive –	♀
✓	EPR61017F	EPR	Lina		29/01/2025	4 mo	– alive –	♀
✓	EPR61022M	EPR	Vanak	Chah	29/01/2025	4 mo	– alive –	♂
✓	EPR61154M	EPR	Polio	Nai	29/01/2025	4 mo	– alive –	♂
✓	EPR60168F	EPR	Makalu	Makalu	09/07/2024	11 mo	– alive –	♀
✓	EPR61020F	EPR	Plume	Sata	29/01/2025	4 mo	– alive –	♀
✓	EPR61019F	EPR	Pamcha		29/01/2025	4 mo	– alive –	♀
✓	EPR61016F	EPR	Eka		29/01/2025	4 mo	– alive –	♀
✓	EPR57383F	EPR-VIC	Nyx †	Siluria	17/08/2022	31 mo	Old age, natural death	♀