"Another Munsterlander - in Scotland"

This is Danny dog owned by Claire who says "I have got a new job -working from home and Danny dog is loving it! He can stay cosy in his bed while I get on with work -he also gets out in the local area more to pick up his "wee-mail" more regularly. Anyway -just took this picture today and thought it was good enough for you to use somewhere". It is lovely thank you Claire - but what is wee mail? or do I hazard a guess??