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Related Clues:
- Animals that gnaw
- Eg, mice
- Eg. rats
- Squirrels and gerbils
- Guinea pigs, e.g
- Owl's prey
- Gerbils, e.g
- Much-studied critters
- Guinea pigs, hamsters etc
- Subjects of much nutritional research
- Research subjects
- Upper body muscles, for short
- Maze-running rodents
- Obsessive researchers
- Porcupines, prairie dogs and pack rats