2015 New York Laws
GBS - General Business
Article 35-D - (General Business) SALE OF DOGS AND CATS
753-A - Veterinarian examination.

  753-a.  Veterinarian  examination.  1. Within five business days of
  receipt, but prior to the sale of any dog or cat, the pet  dealer  shall
  have  a  duly  licensed  veterinarian  conduct  an examination and tests
  appropriate to the breed and age to determine  if  the  animal  has  any
  medical  conditions  apparent  at  the  time  of  the  examination  that
  adversely affect the health of the animal. For animals  eighteen  months
  of  age  or  older,  such  examination  shall include a diagnosis of any
  congenital conditions that adversely affect the health  of  the  animal.
  Any  animal  diagnosed  with  a  contagious disease shall be treated and
  caged separately from healthy animals in accordance  with  section  four
  hundred one of the agriculture and markets law.
2.  All animals shall be vaccinated as required by state or local law.
  Veterinary care appropriate to the species  shall  be  provided  without
  undue  delay  when  necessary. Each animal shall be observed each day by
  the  pet  dealer  or  by  a  person  working  under  the  pet   dealer's
  supervision.
3.  No pet dealer shall knowingly sell any animal that has a diagnosed
  congenital condition or contagious disease that  adversely  affects  the
  health  of  the animal without first informing the consumer, in writing,
  of such condition.