The Dogs Trust in Bridgend says over 600 dogs arrived at the centre last year - a record high.
Staff believe the struggling economy has played a part, but added many people simply don't realise the time and money needed to care properly for a pet.
They have urged would-be owners to think long and hard before committing to a dog.
More top news
Not a bad start to the weekend, bright spells and showers for most of us.
None of the people onboard the boat had been wearing a lifejacket. They were spotted clinging to the hull of their upturned boat.
Staff at seven museums in Wales are taking strike action this weekend over plans to cut their pay.