Police said the alleged assault came during a row between the pair – both of whom were walking their dogs – between 18:15 and 18:25 on Wednesday (15 July).
Explaining what they think happened, officers said in a statement: “A woman walking her dog in the park was assaulted by a man who was also walking his dog, after an argument regarding the ownership of a dog’s ball.
“The man reacted violently to this argument and head-butted the woman before leaving the area.
“He is described as white with a broad build, short dark hair and in his 50s. He was wearing a white long sleeved shirt, jeans and boots.”
Witnesses or those with more information are urged to call 612612 or make an anonymous report using the Crimestoppers online form.