Shocking video has emerged of a Perth dog groomer roughly treating a pet while washing it at their Dianella facility.

The footage, taken at Happy Dog Grooming on Walter Road, was posted on Facebook by a concerned pet owner who warned others about taking their animal to the store for a haircut.

The footage shows the woman hitting the dog. Credit:9 News Perth

The footage has been viewed around 58,000 times, and shows a woman swearing and smacking the pet while allegedly washing it.