Dogs Trust received 370 requests from people looking to give up their dogs in the Dublin area after Christmas.
An average of ten calls a day were made to the organisation's centre in Finglas between St Stephen's Day and the end of January.
The most common excuses were that dog owners didn't have enough time to look after their new pets.
The charity has described the number as 'alarming' as the charity has marked the 40th anniversary of the phrase 'A dog is for life, not just for Christmas'.
And in the last week, Dogs Trust says a box with a dog and three of her 8 week old puppies was dumped in freezing temperatures last week.
The charity says the dogs were rescued and will be looking for homes over the next few weeks.
Tati and her three pups were found in a box on the side of the road in freezing conditions last week. @DogsTrust_IE says it received 370 requests from people looking to give up their dog after Xmas 😢 pic.twitter.com/kPjcPQYH3V
— Kim Buckley (@KiiimBuckley) February 19, 2019