LMM – Raterie La Maison MRDoo 

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Statistics

Breeding statistics

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

Declared litters	14 litters, 126 pups
⨽ internal (born in the rattery)	⨽ 13 litters, 110 pups
⨽ external (other contributed litters)	⨽ 1 litter, 16 pups

All rat records	113 rats
⨽ females	⨽ 58 females (51.3 %)
⨽ males	⨽ 55 males (48.7 %)

Litter statistics

Average mother age	231 days (7.6 months)
Average father age	464 days (15.2 months)
Average litter size	9 pups per litter
Average sex ratio	0.948 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	78 rats (75.7 % of recorded bred rats)
⨽ declared with known date	⨽ 55 rats (70.5 %)
⨽ presumed dead	⨽ 23 rats (29.5 %)

Average lifespan of bred rats	25.3 months (♀: 25.2 months – ♂: 25.4 months)
⨽ infant mortality excluded	⨽ 25.8 months (♀: 26.5 months – ♂: 25.4 months)
⨽ accidents excluded	⨽ 26.6 months (♀: 26.5 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

27.27 %	Unknown cause
12.73 %	Other
12.73 %	Respiratory
9.09 %	Old age, natural death (from 24 month old minimum)
7.27 %	Digestive
7.27 %	Neurological (brain, spinal cords, nerves)
7.27 %	Cardiovascular
7.27 %	Accidents, traumas, poisonings
3.64 %	Eye, ear, mouth, face
3.64 %	Urinary system (kidney, bladder)
1.82 %	Infant mortality (up to 6 week old)

Secondary death causes by decreasing frequency

27.27 %	Undetermined cause (known date)
9.09 %	*Old age, natural death (from 24 month old minimum)
7.27 %	Digestive tumor (stomach, liver, pancreas, intestines...)
7.27 %	Pituitary tumor
5.45 %	Pulmonary edema
3.64 %	Generalized cancer, leukemia, lymphoma
3.64 %	Heart attack, infarct, pulmonary embolism
3.64 %	Undetermined tumor (affected organ unknown)
3.64 %	Facial tumor (excluding Zymbal tumor)
3.64 %	Heatstroke
3.64 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
3.64 %	Lung tumor
3.64 %	*Respiratory
1.82 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.82 %	Kidney tumor
1.82 %	Other heart or vascular problem
1.82 %	Urethral obstruction, urinary retention, stones
1.82 %	Domestic accident (crush, door...)
1.82 %	Other tumor (salivary, spleen, adrenal, thyroid...)
1.82 %	Heart failure, valvular disease
1.82 %	*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
✗	LMM62717F	LMM	Morticia †	Morticia	29/04/2022	10 mo	Other known cause fitting no other category	♀
✓	LMM58858M	LMM	Asmar †	Asmar	19/02/2021	27 mo	Undetermined cause	♂
✓	LMM62030M	LMM	Jacob	Jacob	27/05/2025	17 mo	– alive –	♂
✓	LMM62029M	LMM	Millard	Millard	27/05/2025	17 mo	– alive –	♂
✗	LMM62716F	LMM	Abigail †	Abigail	29/04/2022	10 mo	Other known cause fitting no other category	♀
✓	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	♀