They said they began investigating Doyle after an employee complained in March that animals were being mistreated.
One of the allegations claimed that Doyle performed a surgical procedure on the eye of a Neapolitan Mastiff when he is not licensed to do so. The dog sustained severe bleeding after the procedure last March, which Doyle allegedly performed in the rear of the pet shop.
Police said the employee gave them photographs documenting the dog's condition. She said she was made to treat animals and administer shots when she also is not licensed.
Doyle is also accused of confining a seriously ill exotic kitten and not giving the animal help from a vet, so police said it needed to be euthanized.
He's also charged with failing to provide proper care to a sick puppy that needed help back in April.
He'd brought the animal to Danbury from one of his New York stores and left it in the care of an employee, police said. Without proper treatment for vomiting, diarrhea and coughing, police said the puppy also had to be euthanized.
Doyle was arrested on Monday through a warrant.
Police said he was released on a promise to appear in Court on Aug. 6.
They said animal cruelty charges are also pending against one of Doyle's store managers, Kathy Seton.
(WFSB - July 30, 2015)