LYL – Lyléjagos la raterie 

About

Statistics

Breeding statistics

Breeding activity period	2023–2026 (2 years, 8 months)

Declared litters	20 litters, 203 pups
⨽ internal (born in the rattery)	⨽ 19 litters, 190 pups
⨽ external (other contributed litters)	⨽ 1 litter, 13 pups

All rat records	201 rats
⨽ females	⨽ 94 females (46.8 %)
⨽ males	⨽ 107 males (53.2 %)

Litter statistics

Average mother age	258 days (8.4 months)
Average father age	444 days (14.6 months)
Average litter size	10.2 pups per litter
Average sex ratio	1.138 (about 8 males for 7 females)

Lifespan statistics

Bred rats recorded as deceased	102 rats (54.3 % of recorded bred rats)
⨽ declared with known date	⨽ 100 rats (98 %)
⨽ presumed dead	⨽ 2 rats (2 %)

Average lifespan of bred rats	21.6 months (♀: 20.7 months – ♂: 22.4 months)
⨽ infant mortality excluded	⨽ 23 months (♀: 22.2 months – ♂: 23.6 months)
⨽ accidents excluded	⨽ 23.5 months (♀: 22.9 months – ♂: 24 months)

Oldest bred rat	LYL david junior (deceased at 2 years, 9 months, 20 days)

Death causes statistics

Primary death causes by decreasing frequency

24 %	Respiratory
17 %	Unknown cause
14 %	Old age, natural death (from 24 month old minimum)
12 %	Other
8 %	Eye, ear, mouth, face
6 %	Accidents, traumas, poisonings
6 %	Infant mortality (up to 6 week old)
5 %	Reproductive system
5 %	Neurological (brain, spinal cords, nerves)
1 %	Cardiovascular
1 %	Urinary system (kidney, bladder)
1 %	Digestive

Secondary death causes by decreasing frequency

22 %	Bronchitis, pneumonia
17 %	Undetermined cause (known date)
14 %	*Old age, natural death (from 24 month old minimum)
9 %	Virus, epidemic outbreak, immune deficiency (SDA, Sendai, Tyzzer...)
3 %	Sepsis
3 %	Mammary tumor
3 %	*Infant mortality (up to 6 week old)
2 %	Falls, fractures, head or spinal cord trauma (excluding fights)
2 %	Stroke
2 %	Pituitary tumor
2 %	Facial abscess (excluding teeth and Zymbal gland)
2 %	Stillborn
2 %	Otitis, ear abscess
1 %	Digestive abscess
1 %	Heart failure, valvular disease
1 %	Suffocation, choking
1 %	Malformation, hydrocephalus
1 %	Domestic accident (crush, door...)
1 %	Lung tumor
1 %	Retro-orbital abscess
1 %	Veterinary accident (anesthesia during a minor operation, medical error, etc.)
1 %	Tooth abscess
1 %	Other respiratory trouble
1 %	Zymbal gland tumor
1 %	Uterus infection (metritis, pyometra)
1 %	Heatstroke
1 %	Uterine tumor
1 %	Renal failure
1 %	Dental malocclusion
1 %	*Neurological (brain, spinal cords, nerves)

Related entries

Last contributed litters

See all

State	Birth date	Dam	Sire	Size	Actions
✓	15/03/2026	LYL Super nana	LYL marvin	2
✓	26/10/2025	LYL Q-pide	LYL Nicolas	9
✓	22/09/2025	LYL Phillippine	LYL Oscar	5
✓	25/08/2025	LYL Q-lotte	LYL Lieu jaune	7
✓	21/07/2025	LYL Phyllis	LYL itsi bitsi teenie weenie george 2	5
✓	15/12/2024	LYL Limande	ETR Tristan	12
✓	25/11/2024	ETR benedicte	LYL itsi bitsi teenie weenie john	12
✓	01/07/2024	ETR Plume	ETR nimbus	7
✓	16/04/2024	LYL dixie	ETR Jacoby	14
✓	13/04/2024	LYL donna	ETR Jacoby	10

Recently modified rats

See all

State	Identifier	Prefix	Name	Pup Name	Birth	Age	Death cause	Sex	Actions
✓	LYL58448M	LYL	david junior †		10/07/2023	34 mo	Old age, natural death	♂
✓	LYL58631F	LYL	ella †		18/07/2023	– ?? –	No information	♀
✗	LYL58628F	LYL	emma		18/07/2023	33 mo	– alive –	♀
✓	LYL59139F	LYL	kelyna †		26/03/2024	25 mo	Mammary tumor	♀
✓	LYL58666M	LYL	harnold †		11/09/2023	31 mo	Old age, natural death	♂
✓	LYL59143M	LYL	karl †		26/03/2024	24 mo	Virus, epidemic outbreak, etc.	♂
✓	LYL58978F	LYL	itsi bitsi teenie weenie rose †		08/12/2023	28 mo	Pituitary tumor	♀
✓	LYL58620M	LYL	esteban †		18/07/2023	33 mo	Old age, natural death	♂
✓	LYL59145M	LYL	karlos †		26/03/2024	24 mo	Virus, epidemic outbreak, etc.	♂
✓	LYL59477M	LYL	Lieu jaune †		01/04/2024	24 mo	Virus, epidemic outbreak, etc.	♂