I use Advantix II and have never had a problem. I only use half the little container on each of my two dogs - I have never used the entire container on one dog. I put a small drop between the shoulder blades and a small drop a little lower on the back then throw the rest away. I haven't had any reaction so far but as you know, each dogs reacts differently.
__________________  Karen, mama to Macy and Molly  It is easier to fool people than to convince them they have been fooled. (Mark Twain) |