225 ILCS 605/2.2
No dog dealer, dog breeder, or cat breeder shall separate a puppy or kitten from its mother, for the purpose of sale, until such puppy or kitten has attained the age of 8 weeks.
All licensees under this Act shall maintain records of the origin and sale of all dogs, and such records shall be made available for inspection by the Secretary or the Department upon demand. Such records must contain proof in proper form of purebreds and their pedigree, and evidence of such proof must be provided to any person acquiring a dog from a licensee under this Act. In addition, guard dog services shall be required to maintain records of transfer of ownership, death, or disappearance of a guard dog or sentry dog used by that guard dog service.
225 ILCS 605/2.2