Sans lieu fixe pour le moment, mais avec au moins des visites régulières dans l’Oise, près de Beauvais, la raterie l’Opéra des P’tites Pensées (OPR) est un élevage amateur familial de rats domestiques à très petite échelle et non lucratif.
Je prône la reproduction réfléchie, argumentée et aussi éthique que possible, avec une approche basée sur la transparence, les connaissances sur l’espèce, des connaissances scientifiques, et sur tout l’amour que je porte à mes animaux. Ceux-ci font partie avant tout de la famille, je tiens à ce que mes ratons soient traités comme tels chez mes adoptants.
Rattery
✓
OPR – L'Opéra des P'tites Pensées
Information
| Owner | Loulouteratoune |
|---|---|
| Founded in | 2014 |
| Country | France |
| Localization | Gondecourt |
| Zip Code | 59147 |
| Website | https://operadespensees.weebly.com/ |
About
Statistics
Breeding statistics
| Breeding activity period | 2014–2025 (11 years, 7 months) |
|---|
| Declared litters | 14 litters, 153 pups |
|---|---|
| ⨽ internal (born in the rattery) | ⨽ 14 litters, 153 pups |
| ⨽ external (other contributed litters) | ⨽ 0 litter, no pup |
| All rat records | 153 rats |
|---|---|
| ⨽ females | ⨽ 76 females (49.7 %) |
| ⨽ males | ⨽ 77 males (50.3 %) |
Litter statistics
| Average mother age | 219 days (7.2 months) |
|---|---|
| Average father age | 505 days (16.6 months) |
| Average litter size | 10.9 pups per litter |
| Average sex ratio | 1.013 (about 1 male for 1 female) |
Lifespan statistics
| Bred rats recorded as deceased | 112 rats (73.2 % of recorded bred rats) |
|---|---|
| ⨽ declared with known date | ⨽ 107 rats (95.5 %) |
| ⨽ presumed dead | ⨽ 5 rats (4.5 %) |
| Average lifespan of bred rats | 24.5 months (♀: 24.9 months – ♂: 24.2 months) |
|---|---|
| ⨽ infant mortality excluded | ⨽ 25 months (♀: 25.4 months – ♂: 24.6 months) |
| ⨽ accidents excluded | ⨽ 25.6 months (♀: 25.7 months – ♂: 25.5 months) |
| Oldest bred rat | OPR-DOU Cynder (deceased at 3 years, 4 months, 17 days) |
|---|
Death causes statistics
| Primary death causes by decreasing frequency |
|---|
|
27.1 %
|
Respiratory |
|---|---|
|
17.76 %
|
Old age, natural death (from 24 month old minimum) |
|
16.82 %
|
Unknown cause |
|
14.95 %
|
Neurological (brain, spinal cords, nerves) |
|
4.67 %
|
Digestive |
|
4.67 %
|
Reproductive system |
|
3.74 %
|
Other |
|
3.74 %
|
Eye, ear, mouth, face |
|
2.8 %
|
Accidents, traumas, poisonings |
|
1.87 %
|
Cardiovascular |
|
1.87 %
|
Infant mortality (up to 6 week old) |
| Secondary death causes by decreasing frequency |
|---|
|
17.76 %
|
*Old age, natural death (from 24 month old minimum) |
|---|---|
|
16.82 %
|
Bronchitis, pneumonia |
|
16.82 %
|
Undetermined cause (known date) |
|
12.15 %
|
Pituitary tumor |
|
4.67 %
|
*Respiratory |
|
3.74 %
|
Mammary tumor |
|
2.8 %
|
Lung tumor |
|
1.87 %
|
Fights, injuries, serious bites, subsequent hemorrhage (excluding abnormal hemorrhage) |
|
1.87 %
|
Stroke |
|
1.87 %
|
Digestive tumor (stomach, liver, pancreas, intestines...) |
|
1.87 %
|
Zymbal gland tumor |
|
1.87 %
|
Generalized cancer, leukemia, lymphoma |
|
1.87 %
|
Pulmonary edema |
|
1.87 %
|
Facial tumor (excluding Zymbal tumor) |
|
1.87 %
|
*Infant mortality (up to 6 week old) |
|
0.93 %
|
Uterine tumor |
|
0.93 %
|
Other tumor (salivary, spleen, adrenal, thyroid...) |
|
0.93 %
|
Veterinary accident (anesthesia during a minor operation, medical error, etc.) |
|
0.93 %
|
Other digestive trouble |
|
0.93 %
|
Sepsis |
|
0.93 %
|
Digestive abscess |
|
0.93 %
|
Heart failure, valvular disease |
|
0.93 %
|
Other respiratory trouble |
|
0.93 %
|
Intestinal obstruction (excluding megacolon) |
|
0.93 %
|
*Cardiovascular |
|
0.93 %
|
*Neurological (brain, spinal cords, nerves) |
— Created on 22/04/2014 by Loulouteratoune. Last modified on 12/11/2025.
Related entries
Last contributed litters
| State | Birth date | Dam | Sire | Size |
|---|---|---|---|---|
| ✓ | 15/09/2025 | OPR-HDL Madame la Marquise | RSH Nigel | 11 |
| ✓ | 13/04/2025 | RB. Helldiver | OPR Hazbin | 7 |
| ✓ | 27/02/2025 | OPR Mélitée du Mélampyre | HDL Fendi Mercury | 5 |
| ✓ | 08/09/2024 | OPR Mélitée du Mélampyre | DEL Othello | 8 |
| ✓ | 15/02/2024 | OPR Fizwizbiz | LTE Bulby | 11 |
| ✓ | 10/07/2023 | OPR On dirait un tout petit bébé Licorne | OPR Severus | 16 |
| ✓ | 12/01/2023 | DNA-ARK Catch the Wave | PRH-RCD Dabou | 7 |
| ✓ | 01/12/2021 | CHC Imladris | OPR Ood | 12 |
| ✓ | 29/09/2020 | RSH Waddiwasi | IND Mylo Xyloto | 11 |
| ✓ | 20/07/2019 | OPR-MOL Elysia Crispata | DOU Childe Roland to the Dark Tower Came | 16 |
Recently modified rats
| State | Identifier | Name | Birth | Age | Death cause | Sex |
|---|---|---|---|---|---|---|
| ✓ | OPR61796F | Tsuki | 15/09/2025 | 2 mo | – alive – | ♀ |
| ✓ | OPR61773F | Yami | 15/09/2025 | 2 mo | – alive – | ♀ |
| ✓ | OPR61798F | Silmaril | 15/09/2025 | 2 mo | – alive – | ♀ |
| ✓ | OPR61799M | Palantir | 15/09/2025 | 2 mo | – alive – | ♂ |
| ✓ | OPR61800M | Herugrim | 15/09/2025 | 2 mo | – alive – | ♂ |
| ✓ | OPR59331F | Arsi | 15/02/2024 | 21 mo | – alive – | ♀ |
| ✓ | OPR58431M | Vlad † | 10/07/2023 | 28 mo | Old age, natural death | ♂ |
| ✓ | OPR59333F | Dao | 15/02/2024 | 21 mo | – alive – | ♀ |
| ✓ | OPR57674F | Nom d'une Chandelle ! † | 12/01/2023 | 33 mo | Old age, natural death | ♀ |
| ✓ | OPR58432M | Quid Agis ? † | 10/07/2023 | 23 mo | Zymbal gland tumor | ♂ |
