If your kitten used to purr when petted but now only purrs around another cat, several factors may be at play. As kittens mature, they can become more independent. Living with another cat may reduce its need to compete for your attention.
Negative experiences during handling, or an underlying medical issue, could also affect behavior. If you are concerned, consult a veterinarian.
Encouraging Purring Again
Pet your kitten in areas it enjoys, offer treats, spend quality playtime together, give it space when needed, and be patient. Positive, consistent interactions can help rebuild trust.