Every 6 weeks or so my 6 yr old has an episode of diarrhea and vomiting. She's fine in herself while this is happening. She's been checked by the vet - all fine, next step would be blood tests but he advised it wasn't worth the trauma for her at the moment. She's a very nervy cat and he suggested it was anxiety. But I do buy her cat milk when it's on offer at the supermarket and I think the d&v is coinciding with this. She loves it! Any thoughts? (I'd never give her lactose-containing milk btw).