Gannons Eggs and poultry which is now in its 4th generation was first established in 1875 by Michael Gannon. He started a small egg and poultry business going from house to house selling a few groceries and buying eggs and poultry in return. The business grew from there and Michael was able to set up his sons Michael and Peter in Coppul Wigan UK and started to export eggs and poultry over to them to sell on the English market thus “Gannon’s Eggs UK” was established.

Another of Michaels sons Thomas took over the home business on his father's death in 1917 and he, in turn, left it to his son Michael. With a lot of help and support from his family Michal built the present eggs store and shop at Tullyleague in 1946.

The business around 1940 to 1960 was mainly grocery selling with a shop and travelling shop and buying and selling eggs and poultry from house to house and trading at market days in the surrounding towns. In the late 1950s, early 1960’s the UK market was diminished with England now self-sufficient having been built up again after the war, so the whole business was taking a change around.

In the early 1970’s the first commercial egg production hen house was built at Tullyleague and by now instead of buying eggs in the country they were now going out selling them and so the Carrick Cackler brand name was established.

The grocery and travelling shop business was wound down in 1972 and further expansion was carried out in the poultry business with the Broiler chicken market opening up. In 1996 they built their first free-range egg production house and established Carrick on Shannon Free Range Eggs.

In 2001 a second Free Range shed was built to expand production and a new purpose-built packaging store with grading capacity for 7000 eggs per hour. The business which is currently run by Ray Gannon who is the fourth generation of the Gannon Family are the longest running egg and poultry business in Ireland and the oldest business in Carrick on Shannon.