LMM – Raterie La Maison MRDoo 

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Statistics

Breeding statistics

Breeding activity period	2021–2026 (5 years, 2 months)

Declared litters	13 litters, 117 pups
⨽ internal (born in the rattery)	⨽ 12 litters, 101 pups
⨽ external (other contributed litters)	⨽ 1 litter, 16 pups

All rat records	107 rats
⨽ females	⨽ 56 females (52.3 %)
⨽ males	⨽ 51 males (47.7 %)

Litter statistics

Average mother age	227 days (7.4 months)
Average father age	466 days (15.3 months)
Average litter size	9 pups per litter
Average sex ratio	0.911 (about 11 females for 10 males)

Lifespan statistics

Bred rats recorded as deceased	72 rats (74.2 % of recorded bred rats)
⨽ declared with known date	⨽ 50 rats (69.4 %)
⨽ presumed dead	⨽ 22 rats (30.6 %)

Average lifespan of bred rats	25 months (♀: 24.8 months – ♂: 25.2 months)
⨽ infant mortality excluded	⨽ 25.5 months (♀: 26.1 months – ♂: 25.2 months)
⨽ accidents excluded	⨽ 26.4 months (♀: 26.1 months – ♂: 26.7 months)

Oldest bred rat	LMM Cortex (deceased at 3 years, 1 month, 26 days)

Death causes statistics

Primary death causes by decreasing frequency

26 %	Unknown cause
14 %	Other
14 %	Respiratory
10 %	Old age, natural death (from 24 month old minimum)
8 %	Cardiovascular
8 %	Accidents, traumas, poisonings
6 %	Digestive
6 %	Neurological (brain, spinal cords, nerves)
4 %	Urinary system (kidney, bladder)
2 %	Infant mortality (up to 6 week old)
2 %	Eye, ear, mouth, face

Secondary death causes by decreasing frequency

26 %	Undetermined cause (known date)
10 %	*Old age, natural death (from 24 month old minimum)
6 %	Digestive tumor (stomach, liver, pancreas, intestines...)
6 %	Pituitary tumor
6 %	Pulmonary edema
4 %	Heart attack, infarct, pulmonary embolism
4 %	Undetermined tumor (affected organ unknown)
4 %	Heatstroke
4 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
4 %	Lung tumor
4 %	Generalized cancer, leukemia, lymphoma
4 %	*Respiratory
2 %	Other heart or vascular problem
2 %	Facial tumor (excluding Zymbal tumor)
2 %	Urethral obstruction, urinary retention, stones
2 %	Domestic accident (crush, door...)
2 %	Other tumor (salivary, spleen, adrenal, thyroid...)
2 %	Heart failure, valvular disease
2 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
2 %	Kidney tumor
2 %	*Infant mortality (up to 6 week old)

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	19/04/2026	INC Lidylle	LMM Millard	6
✓	14/04/2026	IND Baghera	Unknown	16
✓	27/05/2025	IND Louana	Unknown	9
✓	04/04/2024	IND Phoebe	INC Apollo	10
✓	30/03/2024	LMM Urumi	LMM Julien	7
✓	11/02/2024	IND Rachel	LMM Ackerman	9
✓	04/09/2023	IND Lushiita	LMM Gomez	12
✓	06/01/2023	INC Hayley	LMM Boo	4
✓	24/12/2022	LMM Freyja	LMM Boo	3
✓	21/07/2022	LMM Freyja	LMM Boo	13

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	LMM62079M	LMM	Yoshito †	Yoshito	04/09/2023	35 mo	Old age, natural death	♂
✗	LMM62722M	LMM	Tully †	Tully	29/04/2022	25 mo	Undetermined cause	♂
✗	LMM62721M	LMM	Fétide †	Fétide	29/04/2022	25 mo	Digestive tumor	♂
✗	LMM62720M	LMM	Splinter †	Digit	29/04/2022	30 mo	Facial tumor	♂
✗	LMM62719F	LMM	Mercredi †	Mercredi	29/04/2022	– ?? –	No information	♀
✗	LMM62718F	LMM	Margaret †	Margaret	29/04/2022	34 mo	Pituitary tumor	♀
✗	LMM62717F	LMM	Morticia †	Morticia	29/04/2022	10 mo	Other known cause fitting no other category	♀
✗	LMM62716F	LMM	Abigail †	Abigail	29/04/2022	10 mo	Other known cause fitting no other category	♀
✗	LMM59544M	LMM	Abel †		11/02/2024	29 mo	Undetermined cause	♂
✓	LMM62073F	LMM	Alaska †	Nanako	04/09/2023	26 mo	Digestive tumor	♀