There are often notices in the local library, baby clinic, your doctors’ surgery as well as in schools, nurseries and on social media such as Facebook.
Fferyllfeydd cymunedol yw'r rhai a geir mewn dinasoedd, trefi a phentrefi ledled y wlad, er enghraifft, ar y stryd fawr, mewn archfarchnadoedd neu mewn meddygfeydd teulu.