Ginny the gambolling Valais Blacknose hopped into Westfield last week to meet the residents, bringing smiles to many faces.
The video has been viewed more than 178,000 times and has been shared worldwide.
Residents and staff welcomed the gentle lamb – complete with nappy – for cuddles and petting.
Team leader and bank deputy manager Lisa Todd said: “One of our company directors retired and breeds them, they are Valais Blacknose, which are bred to be pets.
“I asked when she retired if she’d bring one to visit, knowing it would be loved by the residents.
“We try lots of therapies with the residents, such as pet therapy, reflexology, massage, mindfulness, we do inter-generational practice with a local nursery and we are now providing namaste care which is sensory based.”
Ginny comes from Horsemill Farm and is owned by Anne Garthwaite, who breeds the French-native sheep and others.
It is hoped that the home will be visited by many more lambs, possibly also to coincide with a visit from the nursery children.
