Sheepdog and orphaned lamb go missing after forming friendship
The spring lamb, named Bella, lost its mother and still needs bottle-feeding. To keep it company, the owners had paired it up with their Border Collie named Blake.
The disappearance was reported to a local authority dog warden and has since sparked a social media campaign by the council to track down the pair.
Bella has been chipped but has no collar, with both animals last seen on Monday afternoon.
A spokesman for Newark and Sherwood District Council said: "We think they may have escaped, but we can't rule anything out.
"We are asking anyone who may have seen them to get in touch by calling us on 01636 650000."