Daisy Lowe forces people to pick up their dog's poo when she's out in the park.
The model-and-DJ has a white Maltese terrier and always cleans up after it, and she will chase after other dog owners to ensure they dispose of their mutt's muck when they are in public.
She said: ''I saw a girl in the park, dolled up in big designer clothes, who had a big husky. It did a giant poop on the ground and she just walked off, so I went up to her and said, 'Did you know your dog did a poo over there?' She said she didn't have a plastic bag for it, so I gave her mine. I'm a grandma a heart!''
Daisy - whose parents are musician Pearl Lowe and Bush frontman Gavin Rossdale - insists having a pet and taking responsibility for it keeps her grounded when she isn't working on shoots of strutting her stuff on the catwalk.
The 23-year-old beauty - who previously dated Mark Ronson and 'Doctor Who' actor Matt Smith - added in an interview with The Independent On Sunday New Review magazine: ''It grounds me and encourages me towards a life of domesticity; if I'm out too long he sometimes pees in defiance. He's a little white terrier and it feels amazing to have all this unconditional love from him.''