London ( CNN ) -- Ever wondered where your cat goes after it leaves the house at night ? Curious what your dog gets up to when it is off the leash ? One man was and he has now designed a GPS tracking collar to get a glimpse into the private life of his pet . Dave Evans , from Marlborough in the UK , wanted to work out why his cat Yollo was putting on weight , so he designed a `` cat nav '' to track where he went at night . With his new GPS collar , Yollo 's secrets have been revealed , including his penchant for chasing chickens in the early hours of the morning . `` He was actually traveling a couple of miles pretty much every night , visiting other houses and we suspect those other houses were feeding him , '' says Evans . Now that the mystery of Yollo 's expanding waistline has been solved , Evans has developed the `` G-Paws '' device he says will be available soon for purchase by other curious pet owners . Animal tracking devices have been available for years using various technologies and at a wide range of costs so make sure to compare the various brands before purchasing one . G-Paws is based on existing GPS technology and the data can be plotted directly onto Google Earth . The light weight , waterproof device takes a recording every five seconds and Evans says it is accurate to two or three meters so you can see the precise route of your furry friend . But G-Paws does n't give live data -- so no real-time stalking -- which Evans says has helped him keep the cost and weight of the unit down . It 's not just cats who are going to have their secrets blown -- the G-Paws device can also be fitted to a dog 's collar . If you want to catch your lazy dog-walker , this could tell you exactly how many miles your pet is getting exercised each day . And Evans says he 's even been approached by pigeon racers and hawk owners to see if the G-Paws might work for their birds . `` Everyone who owns a pet -- whether it 's a cat , a dog , a pigeon -- has got a curiosity that when they 're not around , what 's that animal up to ? '' he said . For all those greedy cats doing the nightly neighborhood rounds , the multiple dinner days may soon be over .
Pet owner Dave Evans wanted to work out why his cat Yollo was putting on weight . He said: "I have a very large cat, and she is not overweight at all.