On Sunday we had a nerve-wrecking 30 minutes when we lost Sitka after he chased a deer and recall failed. It was hard to find him in the forest. We have been looking into GPS trackers that we can fit to his collar. There is one on Amazon for £45.50 (Tractive GPS Dog Tracker) but it needs a subscription and some reviews say it doesn't work in woodland. There are ones that use GPS rather than a 4G signal. There is a great one by Garmin Atemos 100 | Garmin but it costs £770! Can you recommend one?