DEL – D’ Ombre et de Lumière 

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Statistics

Breeding statistics

Breeding activity period	2016–2026 (9 years, 6 months)

Declared litters	55 litters, 622 pups
⨽ internal (born in the rattery)	⨽ 41 litters, 452 pups
⨽ external (other contributed litters)	⨽ 14 litters, 170 pups

All rat records	619 rats
⨽ females	⨽ 322 females (52 %)
⨽ males	⨽ 297 males (48 %)

Litter statistics

Average mother age	232 days (7.6 months)
Average father age	517 days (16.9 months)
Average litter size	11.3 pups per litter
Average sex ratio	0.922 (about 13 females for 12 males)

Lifespan statistics

Bred rats recorded as deceased	335 rats (74.3 % of recorded bred rats)
⨽ declared with known date	⨽ 328 rats (97.9 %)
⨽ presumed dead	⨽ 7 rats (2.1 %)

Average lifespan of bred rats	22.2 months (♀: 23.6 months – ♂: 20.6 months)
⨽ infant mortality excluded	⨽ 24.5 months (♀: 25.7 months – ♂: 23.1 months)
⨽ accidents excluded	⨽ 25.7 months (♀: 27.3 months – ♂: 23.9 months)

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

Death causes statistics

Primary death causes by decreasing frequency

21.04 %	Respiratory
16.46 %	Other
10.67 %	Old age, natural death (from 24 month old minimum)
9.76 %	Unknown cause
9.45 %	Infant mortality (up to 6 week old)
8.23 %	Accidents, traumas, poisonings
7.01 %	Neurological (brain, spinal cords, nerves)
5.18 %	Eye, ear, mouth, face
4.57 %	Digestive
3.35 %	Cardiovascular
2.74 %	Reproductive system
0.91 %	Urinary system (kidney, bladder)
0.61 %	Skin

Secondary death causes by decreasing frequency

12.5 %	Undetermined tumor (affected organ unknown)
10.67 %	*Old age, natural death (from 24 month old minimum)
9.76 %	Undetermined cause (known date)
9.45 %	Bronchitis, pneumonia
7.62 %	*Respiratory
4.88 %	*Infant mortality (up to 6 week old)
3.96 %	Stillborn
3.35 %	*Neurological (brain, spinal cords, nerves)
3.05 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
3.05 %	Lung tumor
2.44 %	Domestic accident (crush, door...)
2.13 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.13 %	Zymbal gland tumor
2.13 %	*Other
1.83 %	Heart failure, valvular disease
1.52 %	Facial tumor (excluding Zymbal tumor)
1.52 %	Pituitary tumor
1.52 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.22 %	Mammary tumor
1.22 %	Other heart or vascular problem
1.22 %	Stroke
0.91 %	Other digestive trouble
0.91 %	Tooth abscess
0.91 %	Undetermined infection or abscess
0.61 %	Complications of gestation or parturition
0.61 %	Intestinal obstruction (excluding megacolon)
0.61 %	Other respiratory trouble
0.61 %	Digestive abscess
0.61 %	Uterine tumor
0.61 %	Other infant mortality cause
0.61 %	Epilepsy
0.3 %	Skin tumor, skin cancer
0.3 %	Hereditary megacolon
0.3 %	Pulmonary edema
0.3 %	Heart attack, infarct, pulmonary embolism
0.3 %	Falls, fractures, head or spinal cord trauma (excluding fights)
0.3 %	Brain tumor
0.3 %	Retro-orbital tumor
0.3 %	Food poisoning
0.3 %	Renal failure
0.3 %	Liver failure
0.3 %	Digestive hemorrhage
0.3 %	Generalized cancer, leukemia, lymphoma
0.3 %	Euthanasia without medical cause
0.3 %	Bladder tumor
0.3 %	Subcutaneous abscess
0.3 %	Sepsis
0.3 %	Other reproductive system disorder
0.3 %	Kidney tumor
0.3 %	*Eye, ear, mouth, face

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✗	13/05/2026	OPR Narya	DEL Silco	11
✓	21/04/2026	OPR Vilya	DEL Oz	11
✓	29/03/2026	DEL Shambala	DEL To Aslan's Camp	16
✓	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

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	DEL59465F	DEL	Shya †	Mrs Fitzgibbons	31/10/2023	33 mo	Old age, natural death	♀
✓	DEL62515F	DEL	Dolo	Alabama Monroe	29/03/2026	4 mo	– alive –	♀
✓	DEL58078M	DEL	Morning Glory †		04/03/2023	29 mo	Undetermined cause	♂
✓	DEL58378F	DEL	Nezumi †	Tuktirey	30/04/2023	38 mo	Old age, natural death	♀
✓	DEL58071F	DEL	Daphné †		04/03/2023	30 mo	Bronchitis, pneumonia	♀
✓	DEL61973M	DEL	Maki	Dracula	07/08/2025	12 mo	– alive –	♂
✓	DEL61959M	DEL	Mochi	Sense and Sensibility	10/07/2025	13 mo	– alive –	♂
✓	DEL56420M	DEL-DNR	Sherlock †	The Dragon's Graveyard	19/12/2021	5 mo	Undetermined cause	♂
✓	DEL56419M	DEL-DNR	Rincevent †	Servant of Evil	19/12/2021	21 mo	Undetermined tumor	♂
✓	DEL61960M	DEL	Indy	Revolutionary Road	10/07/2025	13 mo	– alive –	♂