Abstract: This study is a clinical case report of Cheyletiella infestation on a white terrier dog born and raised in Tabriz, Iran. The dog was referred to small animal clinic of Islamic Azad University, Tabriz Branch. In clinical examination of a 2 years old female Terrier, multiple white dandruff-like flakes were seen on the hair coat, especially over the neck. The dog was in good physical condition except the coat appeared to be somewhat dry. Microscopic examination of a skin by tape impression method revealed an infestation of Cheyletiella yasguri.