Pet owners are being urged to think twice before switching insurance companies. The warning comes from Money Saving Expert (MSE) , which has cautioned that while hunting for a cheaper deal might seem smart, it could come at a cost. The site, founded by financial guru Martin Lewis , says thousands risk not being able to claim. But with vet bills soaring and household budgets under pressure, it’s no surprise owners are shopping around. In its latest weekly email , MSE notes that insurance is a