MGR – Les Magist-Rats 

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Statistics

Breeding statistics

Breeding activity period	2021–2026 (4 years, 7 months)

Declared litters	28 litters, 273 pups
⨽ internal (born in the rattery)	⨽ 22 litters, 229 pups
⨽ external (other contributed litters)	⨽ 6 litters, 44 pups

All rat records	261 rats
⨽ females	⨽ 138 females (52.9 %)
⨽ males	⨽ 123 males (47.1 %)

Litter statistics

Average mother age	233 days (7.6 months)
Average father age	479 days (15.7 months)
Average litter size	9.8 pups per litter
Average sex ratio	0.891 (about 9 females for 8 males)

Lifespan statistics

Bred rats recorded as deceased	118 rats (54.4 % of recorded bred rats)
⨽ declared with known date	⨽ 116 rats (98.3 %)
⨽ presumed dead	⨽ 2 rats (1.7 %)

Average lifespan of bred rats	18.9 months (♀: 19.7 months – ♂: 18 months)
⨽ infant mortality excluded	⨽ 19.9 months (♀: 20.8 months – ♂: 19 months)
⨽ accidents excluded	⨽ 20.8 months (♀: 21.5 months – ♂: 20 months)

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

Death causes statistics

Primary death causes by decreasing frequency

34.48 %	Respiratory
12.07 %	Other
8.62 %	Unknown cause
8.62 %	Reproductive system
7.76 %	Eye, ear, mouth, face
6.9 %	Old age, natural death (from 24 month old minimum)
6.9 %	Neurological (brain, spinal cords, nerves)
5.17 %	Infant mortality (up to 6 week old)
5.17 %	Accidents, traumas, poisonings
1.72 %	Muscles and skeleton
1.72 %	Urinary system (kidney, bladder)
0.86 %	Skin
0.86 %	Digestive

Secondary death causes by decreasing frequency

21.55 %	Bronchitis, pneumonia
11.21 %	*Respiratory
7.76 %	Undetermined cause (known date)
6.9 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
6.9 %	*Old age, natural death (from 24 month old minimum)
5.17 %	Mammary tumor
4.31 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.45 %	*Infant mortality (up to 6 week old)
2.59 %	Sepsis
2.59 %	Zymbal gland tumor
2.59 %	Generalized cancer, leukemia, lymphoma
2.59 %	Uterine tumor
2.59 %	Stroke
1.72 %	Bone tumor
1.72 %	Pituitary tumor
1.72 %	Tooth abscess
0.86 %	Other infant mortality cause
0.86 %	Facial tumor (excluding Zymbal tumor)
0.86 %	Facial abscess (excluding teeth and Zymbal gland)
0.86 %	Other head or neck related trouble
0.86 %	Testicular tumor
0.86 %	Subcutaneous abscess
0.86 %	Brain infection, encephalitis, meningitis
0.86 %	Stillborn
0.86 %	Lung tumor
0.86 %	Brain tumor
0.86 %	Pulmonary edema
0.86 %	Renal failure
0.86 %	Digestive tumor (stomach, liver, pancreas, intestines...)
0.86 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.86 %	Kidney tumor
0.86 %	*Neurological (brain, spinal cords, nerves)
0.86 %	*Eye, ear, mouth, face
0.86 %	*Unknown cause

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	20/06/2026	VIC-ANG Mona	MGR Scar	8
✗	17/06/2026	RMS Maple	MIL Finnick	8
✗	03/06/2026	MGR Lutine	MGR Scar	9
✓	22/04/2026	RMS Chesnut	MIL-VIC Rox	13
✗	01/04/2026	MIL Swala	MGR-MIL Abu	11
✓	09/03/2026	MGR Arabella	MGR-MIL Abu	4
✓	12/01/2026	MIL Ninou	RB. Boral	9
✓	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

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	MGR62556F	MGR	Tribelle †	Tribelle	01/04/2026	0 mo	Infant mortality	♀
✓	MGR62554F	MGR	Madeleine	Irma	01/04/2026	4 mo	– alive –	♀
✓	MGR62555F	MGR	April	April	01/04/2026	4 mo	– alive –	♀
✓	MGR61583M	MGR	Patrocle	Abricot	08/05/2025	15 mo	– alive –	♂
✓	MGR62553F	MGR	Bulbine	Bulbine	03/06/2026	2 mo	– alive –	♀
✓	MGR62550F	MGR	Charbonie	Venus	01/04/2026	4 mo	– alive –	♀
✓	MGR62551M	MGR	Rouky	Raphael	01/04/2026	4 mo	– alive –	♂
✓	MGR62552F	MGR	Euphorbia	Euphorbia	03/06/2026	2 mo	– alive –	♀
✓	MGR62451F	MGR	Lita	Lita	01/04/2026	4 mo	– alive –	♀
✓	MGR62452M	MGR	Splinter	Splinter	01/04/2026	4 mo	– alive –	♂