Alan Green is the chairman of the Westmorland branch of the RSPCA.
He says that the overwhelming number of cats in care has now reached crisis point, which means some very difficult decisions are having to be made:
It's got to crisis point. The RSPCA in the north-west now have 250 cats in private boarding kennels- that's not counting all the RSPCA animal homes, which are all full.
"As we re-home them, they fill us up straight away. People don't realise how much a pet costs, even a cat. If every female cat was neutered then we wouldn't have this problem.
"A female cat can, in theory, have up to 12 kittens in a year. Those kittens can then breed within six months so the problem just escalates.
"When every place is full, you then have to decide what to do with the cats.
"If people won't re-home them, then you have to come to the awful decision to put some to sleep. It's a last resort but sometimes you have no choice."
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