CLAMBERING on top of each other to get a better view, these are the unlikely eight culprits who caused a commotion in Sydney's CBD.

The litter of puppies were on an outing to the vet clinic to have their first vaccination shots on Tuesday, when they took a breather in Martin Place.

Owner Trevor Bussey said he was simply giving the puppies a quick run and some fresh air, but it was enough for five police officers and the RSPCA to question if he was running a "puppy farm".

Puppy farming is the practice of intense breeding in inadequate conditions, which fail to meet the dog's psychological, social and behavioural needs.

"I was doing the right thing getting them wormed and vaccinated. I stopped to give them some fresh air and to have a beer myself, and then there's all sorts of dramas," Mr Bussey said.

"Sure, I was hoping I might have sold a couple while I was there, what's wrong with that?"

Mr Bussey said the eight-week-old bull arab x staffy puppies were the first litter he had bred, and were the accidental result of his two adult dogs "hooking up".

"I didn't plan this, so I'm hardly running a puppy farm. I just want to sell them to good homes now, rather than see them go to the pound or get destroyed."

Police spoke to Mr Bussey and cautioned him that he cannot sell puppies which have not been micro-chipped.

The RSPCA yesterday said it was investigating Mr Bussey's breeding and whether the animals were being adequately cared for.

media_camera Picture: Bradley Hunter

media_camera Picture: Bradley Hunter

media_camera Picture: Bradley Hunter