Clara Abson, from the RSPCA, says some animal neglect can be put down to ignorance on the part of their owners.
"I think it is a lot to do with people just not knowing where they can go for help - for instance in looking after their animals, or advice if their animals do get sick" she says.
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Fire crews have been responding to reports of flash flooding in Carmarthenshire. Some homes have been affected.
Medication designed for animals was taken from the building in Abertillery on Thursday night.
More than a thousand riders will be taking part in a series of events in and around the town.