EPR – Au Pays de Rattlousi 

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Statistics

Breeding statistics

Breeding activity period	2015–2025 (10 years, 6 months)

Declared litters	29 litters, 239 pups
⨽ internal (born in the rattery)	⨽ 29 litters, 239 pups
⨽ external (other contributed litters)	⨽ 0 litter, no pup

All rat records	239 rats
⨽ females	⨽ 145 females (60.7 %)
⨽ males	⨽ 94 males (39.3 %)

Litter statistics

Average mother age	196 days (6.4 months)
Average father age	354 days (11.6 months)
Average litter size	8.2 pups per litter
Average sex ratio	0.648 (about 17 females for 11 males)

Lifespan statistics

Bred rats recorded as deceased	196 rats (82 % of recorded bred rats)
⨽ declared with known date	⨽ 151 rats (77 %)
⨽ presumed dead	⨽ 45 rats (23 %)

Average lifespan of bred rats	21.8 months (♀: 21.8 months – ♂: 21.8 months)
⨽ infant mortality excluded	⨽ 22.4 months (♀: 22.9 months – ♂: 21.8 months)
⨽ accidents excluded	⨽ 23.2 months (♀: 23.7 months – ♂: 22.5 months)

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

Death causes statistics

Primary death causes by decreasing frequency

31.13 %	Other
22.52 %	Old age, natural death (from 24 month old minimum)
14.57 %	Unknown cause
8.61 %	Respiratory
5.96 %	Accidents, traumas, poisonings
4.64 %	Neurological (brain, spinal cords, nerves)
4.64 %	Eye, ear, mouth, face
2.65 %	Urinary system (kidney, bladder)
2.65 %	Infant mortality (up to 6 week old)
0.66 %	Digestive
0.66 %	Cardiovascular
0.66 %	Reproductive system
0.66 %	Muscles and skeleton

Secondary death causes by decreasing frequency

22.52 %	*Old age, natural death (from 24 month old minimum)
15.23 %	Undetermined tumor (affected organ unknown)
14.57 %	Undetermined cause (known date)
9.27 %	*Other
3.97 %	*Respiratory
3.31 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
3.31 %	Bronchitis, pneumonia
2.65 %	Stroke
2.65 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
1.99 %	Generalized cancer, leukemia, lymphoma
1.99 %	*Infant mortality (up to 6 week old)
1.32 %	Pituitary tumor
1.32 %	Dental malocclusion
1.32 %	Renal failure
1.32 %	Domestic accident (crush, door...)
1.32 %	Zymbal gland tumor
1.32 %	Undetermined infection or abscess
1.32 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
0.66 %	Uterus infection (metritis, pyometra)
0.66 %	Other urinary disorder
0.66 %	Sepsis
0.66 %	Brain tumor
0.66 %	Lung tumor
0.66 %	Other respiratory trouble
0.66 %	Tooth abscess
0.66 %	Stillborn
0.66 %	Intestinal obstruction (excluding megacolon)
0.66 %	Muscle tumor
0.66 %	Heart failure, valvular disease
0.66 %	Other head or neck related trouble
0.66 %	*Urinary system (kidney, bladder)
0.66 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	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
✓	23/11/2019	EPR Moana	EPR-NMS Karadoc	15

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	EPR61925F	EPR	Jenifael		08/12/2025	3 mo	– alive –	♀
✓	EPR61926F	EPR	Swan		08/12/2025	3 mo	– alive –	♀
✓	EPR61927F	EPR	Maiwen		08/12/2025	3 mo	– alive –	♀
✓	EPR61928F	EPR	Wanda		08/12/2025	3 mo	– alive –	♀
✓	EPR61930F	EPR	Bridgess		08/12/2025	3 mo	– alive –	♀
✓	EPR61931F	EPR	Ariane		08/12/2025	3 mo	– alive –	♀
✓	EPR61932M	EPR	Hector	Derek	08/12/2025	3 mo	– alive –	♂
✓	EPR61933M	EPR	Jasson		08/12/2025	3 mo	– alive –	♂
✓	EPR61934M	EPR	Coton Doux	Santo	08/12/2025	3 mo	– alive –	♂
✓	EPR61935M	EPR	Magawa	Dempsey	08/12/2025	3 mo	– alive –	♂