Halo Collar 4 Review: Is This GPS Dog Fence Worth $599?
Affiliate Disclosure: Smart Pet Gear Lab is reader-supported. Links in this article may be affiliate links — if you purchase through them, we earn a small commission at no extra cost to you. This never affects our recommendations. See our full Affiliate Disclosure. Pricing Note: Prices shown are approximate and may change. Always check the retailer for current pricing. Last verified: April 2026. The Halo Collar 4 promises something that sounds almost too good to be true: a completely wireless dog fence powered by GPS, with no buried wires, no physical barriers, and no limit on how large your boundary can be. At $599 plus a monthly subscription, it’s a serious investment. So is it actually worth it? ...