# Fancy Rat

> According to allpets.ai data | Source: allpets.ai

## Basic Information
| Field | Value |
|---|---|
| Species | Small Mammal |
| Origin | Worldwide (domesticated) |
| Size Category | Small |
| Scientific Name | Rattus norvegicus domestica |
| Husbandry Difficulty | Beginner |

## Vital Statistics
| Metric | Value |
|---|---|
| Weight Range | 0.25–0.5 kg |
| Lifespan | 2–3 years |
| Puppy/Kitten Stage Ends | 3 months |
| Senior Age Threshold | 2 years |

## Puppy/Kitten Development
- **Neonatal Weight**: 5–7 g
- **Growth Notes**: Eyes open 14-17 days; weaning 4-5 weeks; sexually mature 5-6 weeks; full size by 6 months
- **Vaccine Schedule**: No standard vaccines; mycoplasma is endemic

## Adult Preventive Care
- **Exercise Needs**: High - intelligent and active; need daily out-of-cage time and mental stimulation
- **Grooming**: Minimal - self-grooming; elderly/ill rats may need help
- **Annual Exam Focus**: Respiratory (mycoplasma endemic), tumor screening, dental, weight
- **Routine Care**: Daily interaction and free-roam; cage cleaning 2x weekly; respiratory monitoring; group housing

## Health Predispositions
| Condition | Onset Stage | Risk | Hereditary | Screening |
|---|---|---|---|---|
| Mycoplasma pulmonis (Chronic Respiratory Disease) | adult | very high | No | No |
| Mammary Tumors | senior | very high | Yes | No |
| Pituitary Tumors | senior | high | Yes | No |
| Bumblefoot | adult | medium | No | No |
| Kidney Disease | senior | medium | Yes | No |
| Stroke | senior | medium | No | No |

## Obesity Management
- **Risk Level**: Medium
- **Ideal BCS**: 3/9
- **Visual Cues**: Should have visible waist; pear shape in males normal but not excessive
- **Daily Activity Target**: 45 minutes
- **Caloric Formula**: Lab block as staple; fresh vegetables; limited high-fat treats; protein for growing/elderly

## Breeding & Genetics
- **Litter Size**: 6–14
- **Dystocia Risk**: Low
- **CHIC Required Tests**: N/A
- **Recommended DNA Tests**: Tumor line screening (limited)

## Behavioral Ethogram
- **Locomotion**: Climbing, running, jumping, bruxing while exploring (contentment)
- **Social**: Obligate social - MUST be kept in same-sex groups (min 2); mutual grooming; play wrestling; sleeping piles
- **Comfort**: Bruxing (teeth grinding = contentment), boggling (eyes vibrate), pancaking, mutual grooming
- **Stress/Displacement**: Porphyrin staining (red tears), excessive grooming, aggression, reduced activity
- **Breed-Specific**: Most intelligent small pet; highly social; trainable; short-lived; prone to respiratory disease and tumors

## Vocalization Baseline
- **Types**: Bruxing, chattering, squeaking, ultrasonic 50kHz laughter, hissing
- **Frequency Range**: 1,000-80,000 Hz
- **Tendency**: Medium
- **Primary Modality**: Body language primary; ultrasonic vocalizations for social; scent marking; audible sounds for emphasis
- **Tail Signals**: Tail for balance/thermoregulation; lashing = agitation; relaxed = calm

## Emotional Wellbeing
- **Anxiety Proneness**: Low
- **Top Triggers**: Isolation, loss of cage mate, new environment, predator scents
- **Separation Anxiety Risk**: Very High
- **Calming Interventions**: Companion rats (mandatory), consistent handling, familiar bedding/scents, quiet environment
- **Cognitive Dysfunction Risk**: High

## Behavior Problems (Six-Etiology Classification)
- **Top Problems**: Hormonal aggression (intact males), barbering, respiratory-related behavior changes
- **Medical Etiology**: Respiratory disease causing lethargy; pituitary tumors causing coordination loss; mammary tumors
- **Fear/Anxiety Etiology**: Freezing, fleeing, rare biting; porphyrin stress response
- **Frustration Etiology**: Cage bar chewing if understimulated; aggression if overcrowded

## AI Communication Decoding
- **AI-Trainable Signals**: Bruxing/boggling (contentment), ear position, piloerection (fear/cold), porphyrin presence
- **Context-Dependent Vocalizations**: Bruxing can indicate contentment OR stress processing - body relaxation differentiates
- **Interspecies Communication**: Exceptional human bonding; recognizes individuals; seeks interaction; demonstrates empathy; most interactive small pet

## Husbandry Environment
- **Temperature Gradient**: 18-24°C (65-75°F)
- **Humidity Range**: 40-60%; avoid ammonia buildup
- **UVB Requirement**: Not required; crepuscular
- **Diet Type**: Quality lab block as staple; daily fresh vegetables; occasional protein (egg, chicken); limited seeds/nuts
- **Common Health Issues**: Chronic respiratory disease, mammary/pituitary tumors, bumblefoot, kidney disease, stroke

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Citation: According to allpets.ai data