LMM – Raterie La Maison MRDoo 

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Statistics

Breeding statistics

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

Declared litters	9 litters, 68 pups
⨽ internal (born in the rattery)	⨽ 9 litters, 68 pups
⨽ external (other contributed litters)	⨽ 0 litter, no pup

All rat records	75 rats
⨽ females	⨽ 33 females (44 %)
⨽ males	⨽ 42 males (56 %)

Litter statistics

Average mother age	232 days (7.6 months)
Average father age	528 days (17.3 months)
Average litter size	7.6 pups per litter
Average sex ratio	1.273 (about 14 males for 11 females)

Lifespan statistics

Bred rats recorded as deceased	38 rats (50.7 % of recorded bred rats)
⨽ declared with known date	⨽ 35 rats (92.1 %)
⨽ presumed dead	⨽ 3 rats (7.9 %)

Average lifespan of bred rats	23 months (♀: 21.7 months – ♂: 23.6 months)
⨽ infant mortality excluded	⨽ 23.6 months (♀: 23.8 months – ♂: 23.6 months)
⨽ accidents excluded	⨽ 24.8 months (♀: 23.8 months – ♂: 25.2 months)

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

Death causes statistics

Primary death causes by decreasing frequency

22.86 %	Unknown cause
20 %	Other
17.14 %	Respiratory
11.43 %	Accidents, traumas, poisonings
5.71 %	Urinary system (kidney, bladder)
5.71 %	Digestive
5.71 %	Cardiovascular
5.71 %	Old age, natural death (from 24 month old minimum)
2.86 %	Infant mortality (up to 6 week old)
2.86 %	Eye, ear, mouth, face

Secondary death causes by decreasing frequency

22.86 %	Undetermined cause (known date)
8.57 %	Pulmonary edema
5.71 %	Heatstroke
5.71 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
5.71 %	Lung tumor
5.71 %	Generalized cancer, leukemia, lymphoma
5.71 %	Digestive tumor (stomach, liver, pancreas, intestines...)
5.71 %	Undetermined tumor (affected organ unknown)
5.71 %	*Old age, natural death (from 24 month old minimum)
2.86 %	Facial tumor (excluding Zymbal tumor)
2.86 %	Urethral obstruction, urinary retention, stones
2.86 %	Domestic accident (crush, door...)
2.86 %	Kidney tumor
2.86 %	Other tumor (salivary, spleen, adrenal, thyroid...)
2.86 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
2.86 %	Heart attack, infarct, pulmonary embolism
2.86 %	Other heart or vascular problem
2.86 %	*Infant mortality (up to 6 week old)
2.86 %	*Respiratory

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	19/04/2026	INC Lidylle	LMM Millard	6
✓	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
♺	15/06/2022	INC Hayley	IND Onizuka	15

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	LMM62046M	LMM	Sunshine †	Sarahoui	04/04/2024	26 mo	Facial tumor	♂
✓	LMM62043M	LMM	Balthazar	Berg	04/04/2024	27 mo	– alive –	♂
✓	LMM62055F	LMM	Trudy †	Trudy	30/03/2024	26 mo	Generalized cancer, etc.	♀
✓	LMM62368F	LMM	Yui	Yui	19/04/2026	2 mo	– alive –	♀
✓	LMM62369F	LMM	Ritsuko	Ritsuko	19/04/2026	2 mo	– alive –	♀
✓	LMM62370F	LMM	Misato	Misato	19/04/2026	2 mo	– alive –	♀
✓	LMM62371M	LMM	Toji	Toji	19/04/2026	2 mo	– alive –	♂
✓	LMM62372M	LMM	Kensuke	Kensuke	19/04/2026	2 mo	– alive –	♂
✓	LMM62373M	LMM	Ikari	Ikari	19/04/2026	2 mo	– alive –	♂
✓	LMM62058M	LMM	Dolce †	Spellman	30/03/2024	22 mo	Undetermined cause	♂