I was exploring different options of service dog attire on Amazon and I found these two useful patches that I thought I would share. The second patch link actually has several different options of things you can choose. I am purchasing the one that says working and the one that says do not feed.<div>Dogline Service Dog Patch for Harness and Vest Removable 3D Rubber Patches Hook Backing for Small or Large Working Dogs <a href="https://www.amazon.com/dp/B07HJPKNSF/ref=cm_sw_r_cp_api_glt_fabc_EV6340E3W24BM9S0RX1D?_encoding=UTF8&psc=1">https://www.amazon.com/dp/B07HJPKNSF/ref=cm_sw_r_cp_api_glt_fabc_EV6340E3W24BM9S0RX1D?_encoding=UTF8&psc=1</a><br></div><div><br></div><div>Canine Friendly Bark Notes Patch for Collar or Leash <a href="https://www.amazon.com/dp/B01JCKRXEE/ref=cm_sw_r_cp_api_glt_fabc_6C0ERHCA9T2NDVG87J85?_encoding=UTF8&psc=1">https://www.amazon.com/dp/B01JCKRXEE/ref=cm_sw_r_cp_api_glt_fabc_6C0ERHCA9T2NDVG87J85?_encoding=UTF8&psc=1</a><br></div>