EPR – Au Pays de Rattlousi 

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Statistics

Breeding statistics

Breeding activity period	2015–2025 (10 years)

Declared litters	28 litters, 226 pups
⨽ internal (born in the rattery)	⨽ 28 litters, 226 pups
⨽ external (other contributed litters)	⨽ 0 litter, no pup

All rat records	226 rats
⨽ females	⨽ 139 females (61.5 %)
⨽ males	⨽ 87 males (38.5 %)

Litter statistics

Average mother age	196 days (6.4 months)
Average father age	347 days (11.4 months)
Average litter size	8.1 pups per litter
Average sex ratio	0.626 (about 8 females for 5 males)

Lifespan statistics

Bred rats recorded as deceased	193 rats (85.4 % of recorded bred rats)
⨽ declared with known date	⨽ 148 rats (76.7 %)
⨽ presumed dead	⨽ 45 rats (23.3 %)

Average lifespan of bred rats	21.9 months (♀: 21.8 months – ♂: 22 months)
⨽ infant mortality excluded	⨽ 22.5 months (♀: 22.9 months – ♂: 22 months)
⨽ accidents excluded	⨽ 23.3 months (♀: 23.7 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

31.08 %	Other
22.3 %	Old age, natural death (from 24 month old minimum)
14.86 %	Unknown cause
8.78 %	Respiratory
6.08 %	Accidents, traumas, poisonings
4.73 %	Eye, ear, mouth, face
4.73 %	Neurological (brain, spinal cords, nerves)
2.7 %	Infant mortality (up to 6 week old)
2.03 %	Urinary system (kidney, bladder)
0.68 %	Muscles and skeleton
0.68 %	Digestive
0.68 %	Cardiovascular
0.68 %	Reproductive system

Secondary death causes by decreasing frequency

22.3 %	*Old age, natural death (from 24 month old minimum)
15.54 %	Undetermined tumor (affected organ unknown)
14.86 %	Undetermined cause (known date)
9.46 %	*Other
4.05 %	*Respiratory
3.38 %	Bronchitis, pneumonia
3.38 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.7 %	Stroke
2.7 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
2.03 %	*Infant mortality (up to 6 week old)
1.35 %	Undetermined infection or abscess
1.35 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.35 %	Pituitary tumor
1.35 %	Dental malocclusion
1.35 %	Generalized cancer, leukemia, lymphoma
1.35 %	Renal failure
1.35 %	Domestic accident (crush, door...)
1.35 %	Zymbal gland tumor
0.68 %	Muscle tumor
0.68 %	Heart failure, valvular disease
0.68 %	Other head or neck related trouble
0.68 %	Uterus infection (metritis, pyometra)
0.68 %	Sepsis
0.68 %	Brain tumor
0.68 %	Lung tumor
0.68 %	Other respiratory trouble
0.68 %	Tooth abscess
0.68 %	Stillborn
0.68 %	Intestinal obstruction (excluding megacolon)
0.68 %	*Urinary system (kidney, bladder)
0.68 %	*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
✓	EPR58791F	EPR	Brocéliande †	Sadida	15/11/2023	22 mo	Stroke	♀
✓	EPR58790F	EPR	Tatouille †	Pandawa	15/11/2023	23 mo	Undetermined cause	♀
✓	EPR58793M	EPR	Bouh †	Ecaflip	15/11/2023	23 mo	Zymbal gland tumor	♂
✓	EPR57382F	EPR-VIC	Aïko †	Minuit	17/08/2022	34 mo	Old age, natural death	♀
✓	EPR57385F	EPR-VIC	Suki †	Rexel IV	17/08/2022	31 mo	Old age, natural death	♀
✓	EPR61523F	EPR	Trina		24/05/2025	5 mo	– alive –	♀
✓	EPR61522F	EPR	Ranni		24/05/2025	5 mo	– alive –	♀
✓	EPR61521F	EPR	Rennala		24/05/2025	5 mo	– alive –	♀
✓	EPR61018F	EPR	Chara †		29/01/2025	4 mo	Sepsis	♀
✓	EPR60173M	EPR	Horius	Everest	09/07/2024	16 mo	– alive –	♂