Walking my dogs in mountains, took photo of them, later noticed craft above clouds while looking at photo

Took my dogs up Keeper Hill for a walk near Newport Tipperary in Ireland, took photos of dogs to send to my dad. Later at home I enlarged the photos and noticed a flying object above the clouds in one of the photos, I did not see it at the time and heard nothing in the sky. It looks strange. 1 object seen. It looks round but cannot be sure. Hard to make out colour. This is a mountain route in the Silvermines mountains in southern Ireland near my home.