Published: Jun 05, 2013 11:52 AM EDT

SARASOTA COUNTY, Fla.- The Sarasota County Sheriff's Office has arrested a man on a felony charge of Cruelty to Animals for beating his small dog when she wouldn't obey his commands.

Deputies on patrol near Myrtle Street and US 301 heard yelling just before 8:00 p.m., last night and saw a man bent over and making punching movements toward the ground. As they went to investigate they heard an animal yelping in pain, and saw a small dog that was clearly distressed and shaking, partially inside a black backpack.

Deputies say Scott Morrison, 52, who identifies himself as homeless, claimed he was “frustrated and angry” because the dog wasn’t listening to him and admitted biting the dog’s ear in order to “train it.” A witness told deputies that she saw Morrison shake the dog, strike her three times and then slam her on the concrete.

Animal Services took custody of Chloe, a black and white miniature Greyhound mix. She had no visible injuries, but tests are being performed to confirm her condition.