N.Y. Lien Law § 183
Any veterinarian, duly licensed to practice under the laws of this state, who in connection with such practice renders professional services in the treatment of any dog, cat, or other domestic animal or boards any such animal on his premises, or a person keeping a livery stable, or boarding stable for animals, or pasturing or boarding one or more animals, or who in connection therewith keeps or stores any wagon, truck, cart, carriage, vehicle or harness, has a lien dependent upon the possession upon each dog, cat or other animal kept, pastured or boarded by him, and upon any wagon, truck, cart, carriage, vehicle or harness, of any kind or description, stored or kept provided an express or implied agreement is made with the owners thereof, whether such owner be a mortgagor remaining in possession or otherwise, for the sum due him for the professional service rendered, care, keeping, boarding or pasturing of the animal, or for the keeping or storing of any wagon, truck, cart, carriage, vehicle and harness, under the agreement, and may detain the dog, cat or other animal or wagon, truck, cart, carriage, vehicle and harness accordingly, until such sum is paid.
N.Y. Lien Law § 183