Bayhorse Silver Submits Silver/Copper/Antimony Concentrate Samples From Its Bayhorse Silver Mine To Allihies Engineering For Antimony Leach Testing

Vancouver, British Columbia--(Newsfile Corp. - October 16, 2025) - Bayhorse Silver Inc, (TSXV: BHS) (OTCQB: BHSIF) (FSE: 7KXN) (the "Company" or "Bayhorse") has submitted flotation concentrate samples from its silver-copper-antimony rich Bayhorse Silver Mine in Oregon, USA to Allihies Engineering Inc. ("Allihies"), Montana, for testing using Allihies's proprietary Antimony leaching technology.

Allihies using its proprietary, selective industrial Alkaline Selective Leaching ("ASL") hydrometallurgical technology, recently conducted leaching tests on America's Gold and Silver, flotation concentrate from its Galena Mine in Idaho's "Silver Valley" which has similar "tetrahedrite" (silver, copper, antimony zinc) mineralization to the Bayhorse Silver Mine. The leaching tests confirmed very high extraction rates of up to 99% antimony are possible.

The dominant Bayhorse mineralization is primarily tetrahedrite, (BHS2020-12) an antimony sulfide of silver, copper, zinc and iron in veins and stockworks with minor gold present, and is refractory in nature.

Extracting the silver from refractory minerals presents several challenges as the complex mineral structures often leads to lower recovery rates compared to free-milling minerals. Processing refractory minerals also requires high energy inputs, making it cost-prohibitive in some cases. Leaching permits the cost-effective separation of the antimony and sulphur and significantly increases recoveries of the silver, copper and zinc for processing separately.

The silver, antimony, copper and zinc at the Bayhorse Silver Mine are all recognized as both "critical and strategic minerals" in the United States and if the leaching of the Bayhorse antimony with Allihies leaching process is successful, all these critical minerals at the Bayhorse Silver Mine are expected to be recoverable. Recently, Shanghai Metals Exchange quoted antimony 55% concentrate at US$8.24/lb, while Kitco quoted copper at US$4.65/lb, zinc, US$1.40/lb and silver, now also a strategic metal, is over US52/oz. The Company intends to review the pricing of all the recoverable metals in its future cost/benefit analyses for future proposed mining operations.