A man is assisting police with their investigation into an apparent dog baiting incident in Canberra last week.

CCTV vision released by police on Thursday shows a man throwing objects over a backyard fence at Higgins, in the early hours of April 13.

The owner of the house, Alex, later found minced meat covered in a green chemical substance in his backyard.

"I went outside and there were handfuls of green minced meat all over the yard," he said.

"I suspect that it was a poison, I don't know what it is - snail bait or rat poison or something like that."

Alex said a similar incident had taken place two weeks prior, in which he found his backyard scattered with chocolate, which is toxic to dogs.

Neither of the dogs living at the property ate the apparently tainted meat, and were unharmed.

Police said a man is now assisting them with their investigation.