Visitors to Graves Park Animal Farm have noticed an unusual addition in the sheep enclosure.
Guard llamas are being used by farmers to protect the sheep from dog attacks.
The practice is becoming more common on farms across the country and has, so far, been a success at the farm, in Norton.
Farm manager Peter Fletcher said: “We have two female llamas and put them in one at a time with the flock of sheep. They tend to regard the flock as their family so if a dog comes into the field and chase the sheep, the llama tends to chase the dog and unnerve it so it doesn’t do any damage.”
A single male or, as in the case in Sheffield, a mother and a baby are used which bond quickly with the sheep.