Me. Stat. tit. 7 § 3914
Animal shelters, kennels, breeding kennels, boarding kennels and pet shops engaged in buying or selling animals shall keep records of the buyer and seller in each transaction for a 2-year period commencing at the time of purchase or sale. The records must be open to inspection by the department or law enforcement officers. A person not in possession of a valid license for an animal shelter, kennel, breeding kennel, boarding kennel or grandfathered pet shop shall obtain a vendor's license under section 4163 prior to selling, offering for sale or exchanging for value a cat or dog. For purposes of this section, "grandfathered pet shop" has the same meaning as in section 3933. [2019, c. 544, §1(AMD).]
A wolf hybrid may not be sold or exchanged for value. Ownership of a wolf hybrid may be transferred only in accordance with section 3911-B or section 3921-B, subsection 3. [2011, c. 100, §7(NEW).]
7 M.R.S. § 3914