MGR – Les Magist-Rats 

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Statistics

Breeding statistics

Breeding activity period	2021–2025 (3 years, 8 months)

Declared litters	20 litters, 187 pups
⨽ internal (born in the rattery)	⨽ 14 litters, 143 pups
⨽ external (other contributed litters)	⨽ 6 litters, 44 pups

All rat records	191 rats
⨽ females	⨽ 97 females (50.8 %)
⨽ males	⨽ 94 males (49.2 %)

Litter statistics

Average mother age	239 days (7.8 months)
Average father age	478 days (15.7 months)
Average litter size	9.4 pups per litter
Average sex ratio	0.969 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	81 rats (55.1 % of recorded bred rats)
⨽ declared with known date	⨽ 80 rats (98.8 %)
⨽ presumed dead	⨽ 1 rat (1.2 %)

Average lifespan of bred rats	17.1 months (♀: 18.8 months – ♂: 15.2 months)
⨽ infant mortality excluded	⨽ 18.2 months (♀: 19.7 months – ♂: 16.5 months)
⨽ accidents excluded	⨽ 19.4 months (♀: 20.7 months – ♂: 17.9 months)

Oldest bred rat	MGR-MIL Fobia (deceased at 2 years, 7 months, 12 days)

Death causes statistics

Primary death causes by decreasing frequency

36.25 %	Respiratory
13.75 %	Other
8.75 %	Reproductive system
7.5 %	Unknown cause
7.5 %	Neurological (brain, spinal cords, nerves)
6.25 %	Eye, ear, mouth, face
6.25 %	Infant mortality (up to 6 week old)
6.25 %	Accidents, traumas, poisonings
2.5 %	Old age, natural death (from 24 month old minimum)
2.5 %	Muscles and skeleton
1.25 %	Skin
1.25 %	Digestive
1.25 %	Urinary system (kidney, bladder)

Secondary death causes by decreasing frequency

20 %	Bronchitis, pneumonia
13.75 %	*Respiratory
10 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
7.5 %	Mammary tumor
6.25 %	Undetermined cause (known date)
5 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.75 %	*Infant mortality (up to 6 week old)
2.5 %	Bone tumor
2.5 %	Zymbal gland tumor
2.5 %	Generalized cancer, leukemia, lymphoma
2.5 %	Stroke
2.5 %	Pituitary tumor
2.5 %	*Old age, natural death (from 24 month old minimum)
1.25 %	Facial tumor (excluding Zymbal tumor)
1.25 %	Brain infection, encephalitis, meningitis
1.25 %	Sepsis
1.25 %	Stillborn
1.25 %	Subcutaneous abscess
1.25 %	Lung tumor
1.25 %	Brain tumor
1.25 %	Tooth abscess
1.25 %	Uterine tumor
1.25 %	Renal failure
1.25 %	Pulmonary edema
1.25 %	Falls, fractures, head or spinal cord trauma (excluding fights)
1.25 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.25 %	Other infant mortality cause
1.25 %	*Eye, ear, mouth, face
1.25 %	*Unknown cause

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	13/08/2025	RMS-MGR Pixie	MIL Dave	14
✗	08/05/2025	INC Féline	MIL Pat'Hibulaire	14
✓	15/04/2025	MIL Marla	MGR-MIL Taz	10
✗	04/04/2025	MIL Narissa	MGR-MIL Naos	12
✓	08/01/2025	RMS-MIL Layette	MGR Anatole	9
✓	07/01/2025	RMS-MIL Cousette	MGR-MIL Taz	11
✓	25/08/2024	MGR-MIL Flora	VIC Tyrell	3
✓	19/08/2024	MGR-MIL Daffy	MIL Fievel	11
✓	22/01/2024	MIL Mavis	MIL-MGR T'choupi	10
✓	21/01/2024	MGR-MIL Beth	PLS Kenny	13

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	MGR57917M	MGR	Emile †	Curry	06/03/2023	29 mo	Old age, natural death	♂
✓	MGR61637M	MGR-MIL	Jiminy	Milori	04/04/2025	5 mo	– alive –	♂
✓	MGR61636M	MGR-MIL	Abu	Gary	04/04/2025	5 mo	– alive –	♂
✓	MGR61654M	MGR	Citron	Citron	08/05/2025	3 mo	– alive –	♂
✓	MGR61572M	MGR	T.J. (Taz Junior)	Junior	15/04/2025	4 mo	– alive –	♂
✓	MGR61653M	MGR	Pomelo	Pomelo	08/05/2025	3 mo	– alive –	♂
✓	MGR61652M	MGR	Raisin	Raisin	08/05/2025	3 mo	– alive –	♂
✓	MGR61651M	MGR	Arès	Cassis	08/05/2025	3 mo	– alive –	♂
✓	MGR61650F	MGR	Rumi	Nectarine	08/05/2025	3 mo	– alive –	♀
✓	MGR61649M	MGR	Kaki †	Kaki	08/05/2025	0 mo	Infant mortality	♂