Write SQL query to solve given problem: State the locations of all Pet Services business.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.city FROM Business AS T1 INNER JOIN Business_Categories AS T2 ON T1.business_id = T2.business_id INNER JOIN Categories AS T3 ON T2.category_id = T3.category_id WHERE T3.category_name = 'Pet Services'