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.
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A few showers are likely this evening, but these will ease to leave a largely dry night with clear spells. The winds will ease too.
A pedestrian has died after a collision with a van in Tonypandy this morning.
A 94-year-old woman who was injured when she was involved in a crash with a police van has died in hospital.