A new wave of research is challenging long-held beliefs about spaying and neutering dogs, especially for larger breeds.

Viewers shared their own stories, one revealing they had to "put up blackout curtains" to stop the light getting in and distracting their dog.

A family thought they brought home fully-bred cane corso puppies, but as the animals grew, so did the owners' suspicions.

The almost 3-year-old Valerie was trapped April 25 in remarkably good condition after 529 days living like a feral animal.