We actually make both of our urine formulas smell this way on purpose. That’s because due to natural chemistry, all fresh mammal urine (including deer) begins smelling like ammonia within minutes. So we purposely add ammonia to our chemistry for a quicker response. This gives us the added benefits of both a quick odor response, plus a long-term or chemistry response. Please understand that it’s solely urine’s bacterial breakdown odor (what we call the outhouse odor) that alarms deer. And we also know that urine’s “fresh” ammonia odor will never spook any deer! For detailed information on urine and ammonia odor read our “Urine Report” document.