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	108 rats
⨽ females	⨽ 56 females (51.9 %)
⨽ males	⨽ 52 males (48.1 %)

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	0.929 (about 13 females for 12 males)

Lifespan statistics

Bred rats recorded as deceased	70 rats (71.4 % of recorded bred rats)
⨽ declared with known date	⨽ 48 rats (68.6 %)
⨽ presumed dead	⨽ 22 rats (31.4 %)

Average lifespan of bred rats	24.8 months (♀: 24.5 months – ♂: 25 months)
⨽ infant mortality excluded	⨽ 25.3 months (♀: 26 months – ♂: 25 months)
⨽ accidents excluded	⨽ 26.3 months (♀: 26 months – ♂: 26.4 months)

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

Death causes statistics

Primary death causes by decreasing frequency

29.17 %	Unknown cause
14.58 %	Other
14.58 %	Respiratory
8.33 %	Accidents, traumas, poisonings
8.33 %	Cardiovascular
6.25 %	Neurological (brain, spinal cords, nerves)
6.25 %	Old age, natural death (from 24 month old minimum)
4.17 %	Urinary system (kidney, bladder)
4.17 %	Digestive
2.08 %	Infant mortality (up to 6 week old)
2.08 %	Eye, ear, mouth, face

Secondary death causes by decreasing frequency

29.17 %	Undetermined cause (known date)
6.25 %	Pulmonary edema
6.25 %	Pituitary tumor
6.25 %	*Old age, natural death (from 24 month old minimum)
4.17 %	Heatstroke
4.17 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
4.17 %	Lung tumor
4.17 %	Generalized cancer, leukemia, lymphoma
4.17 %	Digestive tumor (stomach, liver, pancreas, intestines...)
4.17 %	Heart attack, infarct, pulmonary embolism
4.17 %	Undetermined tumor (affected organ unknown)
4.17 %	*Respiratory
2.08 %	Other heart or vascular problem
2.08 %	Facial tumor (excluding Zymbal tumor)
2.08 %	Urethral obstruction, urinary retention, stones
2.08 %	Domestic accident (crush, door...)
2.08 %	Other tumor (salivary, spleen, adrenal, thyroid...)
2.08 %	Heart failure, valvular disease
2.08 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
2.08 %	Kidney tumor
2.08 %	*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
✓	LMM62071F	LMM	Agnès	Agnès	04/04/2024	28 mo	– alive –	♀
✓	LMM59546M	LMM	Kenny †	Kenny	06/01/2023	23 mo	Respiratory	♂
✓	LMM62371M	LMM	Toji	Toji	19/04/2026	4 mo	– alive –	♂
✓	LMM62372M	LMM	Kensuke	Kensuke	19/04/2026	4 mo	– alive –	♂
✓	LMM62681M	LMM	Shane †	Shane	15/06/2022	– ?? –	No information	♂
✓	LMM62687F	LMM	Tina †	Tina	15/06/2022	– ?? –	No information	♀
✓	LMM62686F	LMM	Olivia †	Olivia	15/06/2022	– ?? –	No information	♀
✓	LMM62688F	LMM	Mara †	Mara	15/06/2022	36 mo	Undetermined cause	♀
✓	LMM62054F	LMM	Mo'at	Mo'at	30/03/2024	29 mo	– alive –	♀
✓	LMM62666M	LMM	Bloom †	Opale	19/02/2021	32 mo	Old age, natural death	♂