A careless Pet City worker was fired after a video emerged of her slamming a golden retriever in a door and tossing it in an enclosure.

The clip, taken by a customer at the store in Chapel Hills mall in Colorado, shows the employee being rough to the helpless golden retriever trying to escape.

As she attempts to lift one of the puppies out of the kennel, its excitable friend tries to escape along with it.

The clip, taken by a customer at the store in Chapel Hills mall in Colorado, shows the employee slamming the door on the puppy trying to escape

But the worker slams the door on the defenseless puppy's torso twice and throws it back into its cage by the scruff of its neck.

The golden retriever appears hurt and confused as the girls filming can be heard exclaiming in shock.

Michelle Edling posted the video, which her daughter captured, online after it made her 'sad and furious', KRDO reports.

The pet shop has now fired the employee after finding the behavior in the footage 'unacceptable'.

The worker slams the door on the defenseless puppy's torso twice and throws it back into its cage by the scruff of its neck

In a statement issued online, the store said the puppy was 'undergoing full physical exams with a veterinarian' after the disturbing abuse.

The two girls who captured the footage told KRDO: 'we saw the golden retrievers so I started taking a video on snap chat and I just happened to catch her slamming the dog in the kennel door.'

A spokesman for Pet City said: 'We found this behavior to be unacceptable and the employee has been terminated.

'We are conducting a mandatory team meetings to review the proper handling and care instructions of our animals.'