DEL – D’ Ombre et de Lumière 

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Statistics

Breeding statistics

Breeding activity period	2016–2025 (8 years, 11 months)

Declared litters	53 litters, 595 pups
⨽ internal (born in the rattery)	⨽ 40 litters, 436 pups
⨽ external (other contributed litters)	⨽ 13 litters, 159 pups

All rat records	578 rats
⨽ females	⨽ 296 females (51.2 %)
⨽ males	⨽ 282 males (48.8 %)

Litter statistics

Average mother age	231 days (7.6 months)
Average father age	521 days (17.1 months)
Average litter size	11.2 pups per litter
Average sex ratio	0.953 (about 1 female for 1 male)

Lifespan statistics

Bred rats recorded as deceased	303 rats (70.1 % of recorded bred rats)
⨽ declared with known date	⨽ 296 rats (97.7 %)
⨽ presumed dead	⨽ 7 rats (2.3 %)

Average lifespan of bred rats	22.3 months (♀: 24 months – ♂: 20.3 months)
⨽ infant mortality excluded	⨽ 24.5 months (♀: 26.2 months – ♂: 22.5 months)
⨽ accidents excluded	⨽ 25.4 months (♀: 27 months – ♂: 23.4 months)

Oldest bred rat	DEL-MOL Seren (deceased at 4 years, 19 days)

Death causes statistics

Primary death causes by decreasing frequency

22.97 %	Respiratory
18.24 %	Other
9.46 %	Old age, natural death (from 24 month old minimum)
9.12 %	Infant mortality (up to 6 week old)
9.12 %	Unknown cause
7.09 %	Accidents, traumas, poisonings
6.76 %	Neurological (brain, spinal cords, nerves)
5.07 %	Digestive
3.72 %	Eye, ear, mouth, face
3.72 %	Cardiovascular
3.04 %	Reproductive system
1.01 %	Urinary system (kidney, bladder)
0.68 %	Skin

Secondary death causes by decreasing frequency

13.85 %	Undetermined tumor (affected organ unknown)
10.14 %	Bronchitis, pneumonia
9.46 %	*Old age, natural death (from 24 month old minimum)
9.12 %	Undetermined cause (known date)
8.45 %	*Respiratory
4.73 %	*Infant mortality (up to 6 week old)
4.39 %	Stillborn
3.38 %	Lung tumor
3.04 %	*Neurological (brain, spinal cords, nerves)
2.7 %	Domestic accident (crush, door...)
2.36 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.36 %	*Other
2.03 %	Heart failure, valvular disease
1.69 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
1.69 %	Pituitary tumor
1.69 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.35 %	Mammary tumor
1.35 %	Facial tumor (excluding Zymbal tumor)
1.35 %	Zymbal gland tumor
1.35 %	Other heart or vascular problem
1.01 %	Other digestive trouble
1.01 %	Undetermined infection or abscess
1.01 %	Stroke
0.68 %	Complications of gestation or parturition
0.68 %	Intestinal obstruction (excluding megacolon)
0.68 %	Digestive abscess
0.68 %	Tooth abscess
0.68 %	Other respiratory trouble
0.68 %	Uterine tumor
0.68 %	Epilepsy
0.34 %	Heart attack, infarct, pulmonary embolism
0.34 %	Brain tumor
0.34 %	Generalized cancer, leukemia, lymphoma
0.34 %	Food poisoning
0.34 %	Renal failure
0.34 %	Liver failure
0.34 %	Digestive hemorrhage
0.34 %	Euthanasia without medical cause
0.34 %	Bladder tumor
0.34 %	Subcutaneous abscess
0.34 %	Sepsis
0.34 %	Other reproductive system disorder
0.34 %	Kidney tumor
0.34 %	Skin tumor, skin cancer
0.34 %	Hereditary megacolon
0.34 %	Pulmonary edema
0.34 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	12/10/2025	PRH-LVM Tianhe la Rivière Céleste	DEL Infinity	15
✓	07/08/2025	DEL Kendra	DEL Tricatel	12
✓	27/07/2025	DEL Tanya	MIL-DEL Gurney Halleck	14
✓	10/07/2025	DEL Sevika	DEL Nicodemus	14
✓	01/07/2025	DEL-RMJ Mystère	DEL Infinity	12
✓	06/05/2025	OPR-DEL Honeydukes	DEL Lo'ak	5
✓	29/12/2024	MIL-DEL Shadout Mapes	NAM-CPK Spirit	10
✓	19/12/2024	MIL-DEL Irulan Corrino	OPR Vlad	11
✓	05/12/2024	EPR Brocéliande	DEL Ramollo	12
✓	19/11/2024	DEL Pamela Rose	HDL-FAE Shadow Moon	16

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	DEL56411F	DEL-DNR	Citadel of Shadow †		19/12/2021	25 mo	Lung tumor	♀
✓	DEL61947M	DEL	Storm		01/07/2025	6 mo	– alive –	♂
✓	DEL61939F	DEL	Shambala		01/07/2025	6 mo	– alive –	♀
✓	DEL61944M	DEL	Road to Alaska		01/07/2025	6 mo	– alive –	♂
✓	DEL61945M	DEL	Maple Sap		01/07/2025	6 mo	– alive –	♂
✓	DEL61942F	DEL	Luna	Candy Heist	01/07/2025	6 mo	– alive –	♀
✓	DEL61949M	DEL	Jepperd		01/07/2025	6 mo	– alive –	♂
✓	DEL61943M	DEL	Gus		01/07/2025	6 mo	– alive –	♂
✓	DEL61946M	DEL	Dirty Paws		01/07/2025	6 mo	– alive –	♂
✓	DEL61948M	DEL	Colorado		01/07/2025	6 mo	– alive –	♂