It's believed work is being carried out at the former home of Christopher Halliwell.
Family Devastated After 5 Cats Poisoned
A Swindon family's telling Heart they've thought about moving house because something keeps killing their cats.
Since 2013 five of the Petherbridge's family cats appear to have be poisoned by something that caused their kidneys to suddenly fail.
Vets say this type of reaction is usually down to anti-freeze or something similar.
Wiltshire Police started investigating after the fourth pet died but are stepping up their searches around Wanborough.
Recent media attention has led to mum Alison having calls from villagers saying their young cats have died in similar mysterious circumstances.
Now, with the remaining two cats locked in the house constantly they don't know what to do next.
Heart's reporter Charlotte Gay went to find out more.
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