same thing happened to me in our old house and but not with anti freeze
and when i went round to give them the vet bill as they just killed my cat the bloke thought it was funny stood there and laugthed ans slamed the door shut in my face!!! so i payed some people to smash every single window in there house as anyone who messes with my animlas it like messing with my kids.they then moved the very next day the scummy beep beep beep's
