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	616 rats
⨽ females	⨽ 322 females (52.3 %)
⨽ males	⨽ 294 males (47.7 %)

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	0.913 (about 11 females for 10 males)

Lifespan statistics

Bred rats recorded as deceased	337 rats (75.2 % of recorded bred rats)
⨽ declared with known date	⨽ 330 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

20.91 %	Respiratory
16.36 %	Other
10.61 %	Old age, natural death (from 24 month old minimum)
9.39 %	Unknown cause
9.39 %	Infant mortality (up to 6 week old)
8.18 %	Accidents, traumas, poisonings
7.58 %	Neurological (brain, spinal cords, nerves)
5.45 %	Eye, ear, mouth, face
4.55 %	Digestive
3.33 %	Cardiovascular
2.73 %	Reproductive system
0.91 %	Urinary system (kidney, bladder)
0.61 %	Skin

Secondary death causes by decreasing frequency

12.42 %	Undetermined tumor (affected organ unknown)
10.61 %	*Old age, natural death (from 24 month old minimum)
9.39 %	Undetermined cause (known date)
9.39 %	Bronchitis, pneumonia
7.58 %	*Respiratory
4.85 %	*Infant mortality (up to 6 week old)
3.94 %	Stillborn
3.33 %	*Neurological (brain, spinal cords, nerves)
3.03 %	Lung tumor
3.03 %	Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage)
2.42 %	Domestic accident (crush, door...)
2.12 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
2.12 %	Zymbal gland tumor
2.12 %	*Other
1.82 %	Heart failure, valvular disease
1.52 %	Facial tumor (excluding Zymbal tumor)
1.52 %	Pituitary tumor
1.52 %	Digestive tumor (stomach, liver, pancreas, intestines...)
1.21 %	Other heart or vascular problem
1.21 %	Stroke
1.21 %	Mammary tumor
0.91 %	Undetermined infection or abscess
0.91 %	Other digestive trouble
0.91 %	Tooth abscess
0.61 %	Uterine tumor
0.61 %	Epilepsy
0.61 %	Other infant mortality cause
0.61 %	Complications of gestation or parturition
0.61 %	Intestinal obstruction (excluding megacolon)
0.61 %	Brain tumor
0.61 %	Other respiratory trouble
0.61 %	Digestive abscess
0.3 %	Liver failure
0.3 %	Digestive hemorrhage
0.3 %	Generalized cancer, leukemia, lymphoma
0.3 %	Euthanasia without medical cause
0.3 %	Otitis, ear abscess
0.3 %	Bladder tumor
0.3 %	Subcutaneous abscess
0.3 %	Progressive spinal cord damage, degenerative paralysis
0.3 %	Sepsis
0.3 %	Other reproductive system disorder
0.3 %	Kidney tumor
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 %	Retro-orbital tumor
0.3 %	Food poisoning
0.3 %	Renal failure
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
✗	DEL61337M	DEL	Silco †		05/12/2024	19 mo	Undetermined cause	♂
✗	DEL61293M	DEL	Wolfram †	Wolfram	19/12/2024	18 mo	Pituitary tumor	♂
✗	DEL61349M	DEL-RMJ	Boomerang †		29/12/2024	15 mo	Heart attack, etc.	♂
✓	DEL61083M	DEL	Sharik †		19/11/2024	19 mo	Progressive spinal cord damage, etc.	♂
✓	DEL61076M	DEL	Apollon †	Vertov	19/11/2024	14 mo	Brain tumor	♂
✓	DEL60254M	DEL	Ralcaraz †	Mimi-Siku	26/05/2024	24 mo	Otitis, ear abscess	♂
✓	DEL60253M	DEL	Tricatel †	Tricatel	26/05/2024	24 mo	Tooth abscess	♂
✓	DEL59465F	DEL	Shya †	Mrs Fitzgibbons	31/10/2023	33 mo	Old age, natural death	♀
✓	DEL62515F	DEL	Dolo	Alabama Monroe	29/03/2026	5 mo	– alive –	♀
✓	DEL58078M	DEL	Morning Glory †		04/03/2023	29 mo	Undetermined cause	♂