Dogs Trust Ireland has received 297 surrender requests since Christmas Day, a 73 percent increase on the same period last year.
The charity says some owners have been victims of "dog-fishing"- where a puppy purchased online arrives and looks nothing like its picture.
Ciara Byrne, Head of Communications with Dogs Trust, says misleading adds are part of the problem.
Dougal is a fun, playful dog who loves attention, walks & meeting new dog friends🐾
He would love a home with a back garden & a comfy chair to sunbathe on😎A home without many visitors would be Dougal's dream as he can be worried by new people. More here: https://t.co/34o756v9u2 pic.twitter.com/txDse7nZZw— Dogs Trust Ireland (@DogsTrust_IE) February 2, 2022
"Dogs are often advertised as being ‘hypoallergenic’ but as the causes of individual’s allergies can vary, no dog can be said to be 100% hypoallergenic, even if the breed or crossbreed doesn’t shed very much or the dog doesn’t have much or any hair," she said.
In response, Dogs Trust have issued an urgent appeal for people willing to foster a dog to come forward, so they can continue to help as many pups as possible.
Kate Horgan, Fostering Coordinator said she would love to hear from anyone over 18, that has access to dog friendly transport for vet visits and meeting potential adopters, a secure garden and time to temporarily care for a dog in need.