There's a groomer who comes from Puerto Plata to Judy's Pet Resort in Sosua. He comes once a month, with the next scheduled day being June 30. Call Judy's Pet resort for more information or an appointment. (809) 571-1167
There is also a pet salon in Puerto Plata. While I know how to drive there, I am sorry to say that I could not direct you, nor can I give you a phone number.
I have a shih-tzu and a Peke-poo who are groomed at Judy's. One of the dogs is paranoid about being groomed and must be tranquilized first. Judy is a vet tech. She does it with advice from Dr. Bob, the vet next door.
I find the grooming services to be satisfactory for my pets.....not much different than the U.S. Good luck.
Lindsey