Related Clues:

• Hums
• Stray sounds?
• Well-tuned engine sounds
• Vet's office sounds
• Some cries for attention
• Feline cries
• Contented cats' sounds
• Cats' contented sounds
• Copies a happy cat
• Requests for Friskies, maybe
• Kitty sounds
• Cat conversation
• Good vibrations, in the cat world
• Cats' noises
• Feline utterances