MIL – Millo & cie 

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Statistics

Breeding statistics

Breeding activity period	2019–2026 (6 years, 10 months)

Declared litters	88 litters, 768 pups
⨽ internal (born in the rattery)	⨽ 71 litters, 601 pups
⨽ external (other contributed litters)	⨽ 17 litters, 167 pups

All rat records	780 rats
⨽ females	⨽ 391 females (50.1 %)
⨽ males	⨽ 389 males (49.9 %)

Litter statistics

Average mother age	227 days (7.4 months)
Average father age	447 days (14.7 months)
Average litter size	8.7 pups per litter
Average sex ratio	0.995 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	387 rats (62.6 % of recorded bred rats)
⨽ declared with known date	⨽ 359 rats (92.8 %)
⨽ presumed dead	⨽ 28 rats (7.2 %)

Average lifespan of bred rats	21.8 months (♀: 22.9 months – ♂: 20.6 months)
⨽ infant mortality excluded	⨽ 21.8 months (♀: 22.9 months – ♂: 20.6 months)
⨽ accidents excluded	⨽ 22.3 months (♀: 23.5 months – ♂: 21.1 months)

Oldest bred rat	MIL-VIC Extremis (deceased at 3 years, 6 months, 14 days)

Death causes statistics

Primary death causes by decreasing frequency

22.56 %	Respiratory
19.22 %	Old age, natural death (from 24 month old minimum)
12.81 %	Unknown cause
11.14 %	Other
8.64 %	Neurological (brain, spinal cords, nerves)
6.96 %	Eye, ear, mouth, face
5.85 %	Accidents, traumas, poisonings
5.57 %	Reproductive system
3.06 %	Cardiovascular
2.51 %	Digestive
0.56 %	Urinary system (kidney, bladder)
0.56 %	Skin
0.56 %	Muscles and skeleton

Secondary death causes by decreasing frequency

19.22 %	*Old age, natural death (from 24 month old minimum)
18.66 %	Bronchitis, pneumonia
12.81 %	Undetermined cause (known date)
5.01 %	Mammary tumor
3.34 %	Pituitary tumor
3.06 %	Undetermined tumor (affected organ unknown)
3.06 %	*Respiratory
2.51 %	Stroke
2.23 %	Facial tumor (excluding Zymbal tumor)
2.23 %	Generalized cancer, leukemia, lymphoma
2.23 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.67 %	Heart attack, infarct, pulmonary embolism
1.67 %	Zymbal gland tumor
1.67 %	*Neurological (brain, spinal cords, nerves)
1.39 %	Undetermined infection or abscess
1.39 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
1.11 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.11 %	Suffocation, choking
1.11 %	*Other
0.84 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
0.84 %	Sepsis
0.84 %	Facial abscess (excluding teeth and Zymbal gland)
0.84 %	Other tumor (salivary, spleen, adrenal, thyroid...)
0.84 %	Hemorrhage (exaggerated relative to the context, coagulation disorder, hemophilia)
0.84 %	Domestic accident (crush, door...)
0.84 %	*Digestive
0.56 %	Brain infection, encephalitis, meningitis
0.56 %	Complications of gestation or parturition
0.56 %	Tooth abscess
0.56 %	Other heart or vascular problem
0.56 %	Dental malocclusion
0.56 %	Urinary or kidney infection
0.56 %	*Eye, ear, mouth, face
0.28 %	Subcutaneous abscess
0.28 %	Other respiratory trouble
0.28 %	Otitis, ear abscess
0.28 %	Other accident or trauma
0.28 %	Bone tumor
0.28 %	Pulmonary edema
0.28 %	Other known cause fitting no other category
0.28 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.28 %	Digestive hemorrhage
0.28 %	Lung tumor
0.28 %	Progressive spinal cord damage, degenerative paralysis
0.28 %	Retro-orbital abscess
0.28 %	Brain tumor
0.28 %	Joint or bone infection, septic arthritis
0.28 %	Liver failure
0.28 %	*Skin
0.28 %	*Accidents, traumas, poisonings

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	17/03/2026	MGR Séraphine	MIL-VIC Viserion	6
✗	12/03/2026	MIL Yudo	MIL Pegasus	12
✗	11/03/2026	MIL Orora	RMS Metadone	8
✓	14/01/2026	MIL Ruma	MIL Pegasus	9
✓	12/01/2026	MIL Ninou	RB. Boral	9
✓	08/08/2025	RB. Imara	MIL Dave	10
✓	29/07/2025	RMS-MGR Mercredi	MIL-VIC Shogoun	10
✓	19/07/2025	MIL Pivoine	VIC Lazar	8
✓	19/07/2025	MIL Pahara	MIL-VIC Poussifeu	8
✓	18/05/2025	MIL Melusine	MIL Finilac	8

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✗	MIL59802M	MIL	Caïn  †		08/04/2024	25 mo	Facial tumor	♂
✗	MIL61579M	MIL	Merlin †		18/05/2025	12 mo	Bronchitis, pneumonia	♂
✗	MIL61549F	MIL	Sisou †		18/05/2025	12 mo	Bronchitis, pneumonia	♀
✓	MIL58479F	MIL	Pistache †		13/05/2023	29 mo	Mammary tumor	♀
✓	MIL60262F	MIL	Martine †		23/04/2024	25 mo	Old age, natural death	♀
✓	MIL61565M	MIL	Fuyu	Pesto	13/05/2025	12 mo	– alive –	♂
✓	MIL61566M	MIL	SooJin	Ripley	13/05/2025	12 mo	– alive –	♂
✓	MIL62255M	MIL	Rufus	Calmate	17/03/2026	2 mo	– alive –	♂
✓	MIL62249F	MIL	Darinka	Thaelia	17/03/2026	2 mo	– alive –	♀
✓	MIL62140M	MIL	Arlequin		14/01/2026	4 mo	– alive –	♂