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I agree, I do have another cat and I will have him chipped.
The rescue place already know of the situation as I rang them straight away. i do need to ring them back when they have had time to go through the papers, I would also like to visit to see for myself. I'm sure she's in a good home as the rescue place do, as far as i know check up on the people who take the pets away, it's a pity that they don't do more rigerous checks when they are brought in.