Olde took the “very hard decision” to give his Tibetan mastiff, Tiny, to Save A Paw in December 2024, after her behaviour worsened.
He feared she might harm his children.
When the 40-year-old dropped Tiny off, he was surprised to see Rahman was having a patio laid in winter.
“I am a strong believer that if they dig up that patio there will be hundreds of dogs under there, 100%,” said Olde, from Maidstone, Kent.
“Because of how many dogs died there, there has to be more. If we were dealing with humans, the whole house would’ve been torn down.”
Police initially found 37 dead dogs at the rescue centre, but discovered four more during a later search.