The RSPCA in Swansea says it is seeing an increase in the number of abandoned cats and kittens it's taking in.
Staff there described this year as the 'worst ever' for the problem and said they're struggling to cope.
The problem stems from cat owners being caught out when their un-neutered pets have litters.
Now the society is working with Cardiff University to try to establish why owners aren't taking preventative measures.
More top news
Barclays has announced 203 job losses at its Merchant Services Operations and Technology Divisions in Pentwyn.
Neil Hamilton confirms that he will stand in a leadership contest against the AM who ousted him just a month ago
A survey into inappropriate behaviour questioned Assembly members and people who work either for individual AMs or the Assembly as a whole.