Royal Mail is asking dog owners in Wales to keep their animals under control when the postman calls.
Over 140 postmen and women were attacked across Wales by dogs from April 2012 to April 2013.
The number of attacks rises during the school holidays and in the summer months.
150 years after his birth, David Lloyd George is included in a new series of stamps recognising 'Great Britons'. Royal Mail say they hope the stamp will be a lasting tribute to the memory of the MP for Caernarfon Boroughs, who became Prime Minister during the First World War.
He is also remembered as the Chancellor of the Exchequer who laid the foundations of the welfare state in his 'People's Budget'. It introduced old age pensions for the first time, paid for by death duties on the wealthy.
The new stamp has been welcomed by Liberal Democrat AM William Powell, whose Mid and West Wales region includes Llanystumdwy where Lloyd George was brought up. He said that Britain's last Liberal premier was 'without doubt one of our nation's Prime Ministers'.
Former Welsh international John Charles is featured on a new set of stamps marking the 150th anniversary of the founding of the Football Association.
Charles, who died in 2004, is considered one of Wales' greatest ever footballers.
The stamp set celebrates 11 of the greatest football heroes from across the UK, with the players depicted in their home nation strip:
John Barnes (England); Gordon Banks (England); George Best (Northern Ireland); John Charles (Wales); Bobby Charlton (England); Jimmy Greaves (England); Kevin Keegan (England); Denis Law (Scotland); Dave Mackay (Scotland); Bobby Moore (England) and Bryan Robson (England).
A Gold Medal stamp to celebrate Jade Jones' gold medal win in the Women’s Taekwondo under 57kg will be available to buy from lunchtime.
Royal Mail will also paint a post box gold in Flint to commemorate the teenager's success.
The stamps will be on sale in over 500 Post Offices across the UK, including the Post Office at Church Street, Flint, and Henblas Street, Wrexham.
The 19-year-old from Flintshire showed no fear in the final against the Chinese fighter last night, closing out a 6-4 victory.
Last night's win gave Britain its first ever Olympic medal in the sport and meant Jade is the youngest competitor in Team GB to secure a medal at London 2012.
Portmeirion features as part of a new Royal Mail stamp collection, depicting 26 landmarks across the country.
One of Wales' top visitor attractions, the North Wales village was created by architect Clough Williams-Ellis in a Mediterranean style starting in the early 20th century.
Huw Jones, Chair of Portmeirion Ltd, said "Portmeirion is known far and wide for its beauty and character and it is very appropriate that these stamps will carry that message across the world for everyone to enjoy."