Cats are the most popular pet in Switzerland. Since the majority of Swiss residents live in rented apartments, indoor cats are common. Veterinary practices in the country told newspaper Blick that between 20 and 40 percent of the pets they see are too fat, with cats particularly affected. The reason? Overfeeding and lack of exercise, veterinarians told the paper. “Indoor cats often lack the incentive to move and start to eat out of boredom,” vet Martina Schybli told the paper.