Animal welfare workers are keen to trace the owners of two dogs spotted roaming on the NC500 route in Caithness.
The Scottish SPCA has appealed for information after a dog was handed in to its Caithness and Sutherland Animal Rescue and Rehoming Centre earlier this week.
Another dog was spotted running free in the Durness area, north Sutherland.
The area has recently been frequented by a large number of tourists.
The first dog, a male white Staffordshire bull terrier, was contained by a member of the public as his lead had become tangled around his legs
Scottish SPCA senior inspector Andy Brown said: “The staffie is very friendly and has a lovely nature. He has been made comfortable at the centre.
“He was found with his collar and lead still attached.
“The same day we received a call regarding an injured stray dog scared and frightened running in and out of the traffic on the busy single track road.
“The brindle rottweiler cross has been seen in the Laid area a few miles along from Durness. He also has his lead and collar still attached.
“He is lame and very scared. If people do see him, please do not approach him. We don’t believe he is dangerous but if he is cornered, he may react negatively due to fear.
“If anyone does see him, contact us immediately with the location details.”
He added: “From the staffie’s microchip, we found his name is Zero and is registered in the Linwood area near Paisley. Initial inquiries also point to connections in Pollockshaws and Johnstone.
“We are keen to trace the owners of these dogs as soon as possible. If anyone recognises them, please contact our confidential animal helpline on 03000 999 999.”