More than 30 family cats in Lake Hayes Estate near Queenstown have disappeared over the past 12 months - with fears they are being trapped and killed.
Queenstown Cat Rescue co-founder Julia Milley, of Dalefield, said the trust received telephone calls "all the time" from owners on the estate who reported their cats missing.
Ms Milley said this week that there had been one or two calls a year ago, but six or seven in the past few months.
The cats ranged in ages and were obviously domesticated, not feral, due to their condition and behaviour, she said.
"Cats have either gone back to where they previously lived, or wandered off ...