MGR – Les Magist-Rats 

About

Statistics

Breeding statistics

Breeding activity period	2021–2026 (4 years, 5 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	254 rats
⨽ females	⨽ 132 females (52 %)
⨽ males	⨽ 122 males (48 %)

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	0.924 (about 13 females for 12 males)

Lifespan statistics

Bred rats recorded as deceased	117 rats (55.7 % of recorded bred rats)
⨽ declared with known date	⨽ 115 rats (98.3 %)
⨽ presumed dead	⨽ 2 rats (1.7 %)

Average lifespan of bred rats	19 months (♀: 20 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

34.78 %	Respiratory
12.17 %	Other
8.7 %	Reproductive system
8.7 %	Unknown cause
7.83 %	Eye, ear, mouth, face
6.96 %	Neurological (brain, spinal cords, nerves)
6.96 %	Old age, natural death (from 24 month old minimum)
5.22 %	Accidents, traumas, poisonings
4.35 %	Infant mortality (up to 6 week old)
1.74 %	Urinary system (kidney, bladder)
1.74 %	Muscles and skeleton
0.87 %	Skin
0.87 %	Digestive

Secondary death causes by decreasing frequency

21.74 %	Bronchitis, pneumonia
11.3 %	*Respiratory
7.83 %	Undetermined cause (known date)
6.96 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
6.96 %	*Old age, natural death (from 24 month old minimum)
5.22 %	Mammary tumor
4.35 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
2.61 %	Generalized cancer, leukemia, lymphoma
2.61 %	Uterine tumor
2.61 %	Stroke
2.61 %	Sepsis
2.61 %	Zymbal gland tumor
2.61 %	*Infant mortality (up to 6 week old)
1.74 %	Pituitary tumor
1.74 %	Tooth abscess
1.74 %	Bone tumor
0.87 %	Pulmonary edema
0.87 %	Renal failure
0.87 %	Digestive tumor (stomach, liver, pancreas, intestines...)
0.87 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.87 %	Kidney tumor
0.87 %	Other infant mortality cause
0.87 %	Facial tumor (excluding Zymbal tumor)
0.87 %	Facial abscess (excluding teeth and Zymbal gland)
0.87 %	Other head or neck related trouble
0.87 %	Testicular tumor
0.87 %	Subcutaneous abscess
0.87 %	Brain infection, encephalitis, meningitis
0.87 %	Stillborn
0.87 %	Lung tumor
0.87 %	Brain tumor
0.87 %	*Neurological (brain, spinal cords, nerves)
0.87 %	*Eye, ear, mouth, face
0.87 %	*Unknown cause

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	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
✓	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

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	MGR62452M	MGR	Splinter	Splinter	01/04/2026	3 mo	– alive –	♂
✓	MGR62451F	MGR	Lita	Lita	01/04/2026	3 mo	– alive –	♀
✓	MGR62453F	MGR	Topaze	Jennika	01/04/2026	3 mo	– alive –	♀
✓	MGR61824F	MGR	Oksana †	Nebraska	13/08/2025	9 mo	Respiratory	♀
✓	MGR59805M	MGR	Éden  †		21/01/2024	28 mo	Old age, natural death	♂
✓	MGR62167F	MGR	Winry	Sechura	30/12/2025	6 mo	– alive –	♀
✓	MGR62166M	MGR	Zuma	Ténéré	30/12/2025	6 mo	– alive –	♂
✓	MGR62222M	MGR-MIL	Jaz	KSI	12/01/2026	6 mo	– alive –	♂
✓	MGR62209M	MGR	Balto	Peket	06/01/2026	6 mo	– alive –	♂
✓	MGR60401M	MGR	Truc †		21/01/2024	28 mo	Old age, natural death	♂