A Labrador was taken to a vet and a woman suffered cuts to her hand following an attack by another dog yesterday (Sunday June 1).
Police were called to Southwater Country Park just before 1.30pm.
A Sussex Police spokesperson said a dog described as a Staffordshire Bull Terrier attacked a Labrador and its owner.
The incident is being investigated.
Anyone with information can contact police on 101 quoting serial 784 of 1/6, or email firstname.lastname@example.org.
Alternatively, you can contact the independent charity Crimestoppers anonymously on 0800 555111.