CAT owners in Flintshire have been warned to be vigilant following a suspected poisoning incident over the Christmas period. RSPCA Cymru says it was contacted by the owner of Gizmo - a black and white domestic shorthair cat - after it was thought that he had been poisoned by antifreeze just before Christmas in the Bryn Onnen area in Flint. The cat was taken to a local vet on Christmas Eve after he became unwell with the vet confirming acute renal failure. Sadly he deteriorated rapidly and was put to sleep by the vet to prevent any further suffering on Boxing Day.