A couple of weeks ago, I came across an article by Dr J (though twitter) on the Feline Body Mass Index. It’s the same concept as the human BMI measurement where you look at a person’s weight and height and work out the percentage of body mass made up of fat.

Being the math geek in me, the article had a formula for calculating a cat’s body mass index so I thought I’d give it a whirl for my two 1 year old indoor cats, Rocket and Rosie (who will forever be known as The Kittens in our household).

Here’s your cat’s FBMI calculation:

While your cat is in a standing position, with the legs perpendicular to the ground and the head upright (good luck with that!):

1. Measure the circumference of your cat’s rib cage. (The leve

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