N.Y. General Business Law § 753
1. If, within fourteen business days following the sale of an animal subject to this article or receipt of the written notice required by section seven hundred fifty-four of this article, whichever occurred last, a veterinarian of the consumer's choosing, licensed by a state certifies such animal to be unfit for purchase due to illness or the presence of symptoms of a contagious or infectious disease, or if, within one hundred eighty calendar days following such sale or receipt, whichever occurred last, a licensed veterinarian certifies such animal to be unfit for purchase due to a congenital malformation which adversely affects the health of the animal, the pet dealer shall afford the consumer the right to choose one of the following options: