MGR – Les Magist-Rats 

About

Statistics

Breeding statistics

Breeding activity period	2021–2026 (4 years, 1 month)

Declared litters	24 litters, 236 pups
⨽ internal (born in the rattery)	⨽ 18 litters, 192 pups
⨽ external (other contributed litters)	⨽ 6 litters, 44 pups

All rat records	224 rats
⨽ females	⨽ 115 females (51.3 %)
⨽ males	⨽ 109 males (48.7 %)

Litter statistics

Average mother age	235 days (7.7 months)
Average father age	477 days (15.7 months)
Average litter size	9.8 pups per litter
Average sex ratio	0.948 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	111 rats (61.7 % of recorded bred rats)
⨽ declared with known date	⨽ 109 rats (98.2 %)
⨽ presumed dead	⨽ 2 rats (1.8 %)

Average lifespan of bred rats	18.7 months (♀: 20 months – ♂: 17.4 months)
⨽ infant mortality excluded	⨽ 19.6 months (♀: 20.7 months – ♂: 18.5 months)
⨽ accidents excluded	⨽ 20.5 months (♀: 21.4 months – ♂: 19.5 months)

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

Death causes statistics

Primary death causes by decreasing frequency

35.78 %	Respiratory
12.84 %	Other
9.17 %	Reproductive system
9.17 %	Unknown cause
8.26 %	Eye, ear, mouth, face
6.42 %	Neurological (brain, spinal cords, nerves)
5.5 %	Accidents, traumas, poisonings
4.59 %	Infant mortality (up to 6 week old)
3.67 %	Old age, natural death (from 24 month old minimum)
1.83 %	Urinary system (kidney, bladder)
1.83 %	Muscles and skeleton
0.92 %	Digestive
0.92 %	Skin

Secondary death causes by decreasing frequency

22.94 %	Bronchitis, pneumonia
11.01 %	*Respiratory
8.26 %	Undetermined cause (known date)
7.34 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
5.5 %	Mammary tumor
4.59 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.67 %	*Old age, natural death (from 24 month old minimum)
2.75 %	Zymbal gland tumor
2.75 %	Generalized cancer, leukemia, lymphoma
2.75 %	Uterine tumor
2.75 %	Sepsis
2.75 %	*Infant mortality (up to 6 week old)
1.83 %	Stroke
1.83 %	Pituitary tumor
1.83 %	Tooth abscess
1.83 %	Bone tumor
0.92 %	Lung tumor
0.92 %	Brain tumor
0.92 %	Pulmonary edema
0.92 %	Renal failure
0.92 %	Digestive tumor (stomach, liver, pancreas, intestines...)
0.92 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.92 %	Kidney tumor
0.92 %	Other infant mortality cause
0.92 %	Facial tumor (excluding Zymbal tumor)
0.92 %	Facial abscess (excluding teeth and Zymbal gland)
0.92 %	Other head or neck related trouble
0.92 %	Testicular tumor
0.92 %	Subcutaneous abscess
0.92 %	Brain infection, encephalitis, meningitis
0.92 %	Stillborn
0.92 %	*Neurological (brain, spinal cords, nerves)
0.92 %	*Eye, ear, mouth, face
0.92 %	*Unknown cause

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	06/01/2026	MGR Rani	MGR Nibbler	11
✓	30/12/2025	MGR Lutine	RB. Loulou	9
✓	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

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✗	MGR62205M	MGR	Kalahari	Kalahari	30/12/2025	3 mo	– alive –	♂
✓	MGR62203M	MGR	Danakil	Danakil	30/12/2025	3 mo	– alive –	♂
✓	MGR62204F	MGR	Vanille	Nubie	30/12/2025	3 mo	– alive –	♀
✓	MGR60404F	MGR	Am †		21/01/2024	23 mo	Respiratory	♀
✓	MGR62164M	MGR	Berlioz	Ordos	30/12/2025	3 mo	– alive –	♂
✓	MGR61829M	MGR	Mario	Texas	13/08/2025	7 mo	– alive –	♂
✓	MGR61700F	MGR	Scampi	Figue	08/05/2025	11 mo	– alive –	♀
✓	MGR62166M	MGR	Zuma	Ténéré	30/12/2025	3 mo	– alive –	♂
✓	MGR62167F	MGR	Winry	Sechura	30/12/2025	3 mo	– alive –	♀
✓	MGR62168M	MGR	Marius	Karakoum	30/12/2025	3 mo	– alive –	♂