herd care

I'm not positive but I'm fairly certain this is the a and style I lost in my moving around these last few years. I'm at a point now that I need another one. https://www.valleyvet.com/ct_detail.html?pgguid=30e07468-7b6a-11d5-a192-00b0d0204ae5 Tell me which guns do y'all use? Preferences for...