I'm not sure what it was - I'm putting it down to the fact that she hard a slightly larger than normal meal plus I feed her every week. Next feed I'll wait for the 10 days to 2 weeks then give her a slightly smaller than normal one and from there only feed her once every 10 days. I've given her some probiotic in her water and she's being quite active and OK - so it all seems alright *fingers crossed*