I am so glad I saw this. I applied Vectra 3D to my chihuahua last week. Several hours later the left side of his body began to spasm and he couldn't stay in one place. His water intake also significantly decreased. I asked the vet about it. They told me to give him a bath and prescribed muscle relaxants for him. Of course they did not work. I started searching the web and came across your discussion. Within 15 minutes I was giving him a bath with Dawn dish detergent. He seems to be calmer already. I'll give him another bath tomorrow with the detergent to make sure I remove all traces of this stuff from my baby. This was my first and last time trying Vectra 3D. Normally I use Revolution on him. I guess I will go back to it and find a vet that will order it for me since my current vet only prescribes Vectra.View Thread