This gnaw handily attaches to the bars of your pet's cage. Ancol Just 4 Pet Knobbly Gnaw Cage Chew. Now VioVet is owned by Pinnacle Pet Group, based in the UK. VioVet Ltd was founded in 2006 by Luke Cousins, the then 16-year-old son of a successful St Albans-based vet and veterinary nurse.