I bought First Shield Trio my Shih Tzu (4) & Westie (8). My Shih Tzu went NUTS!!
He was freaking out after I put the medicine on him. This went on for 10 days! During that time I took him to a different vet, he had a rash, etc. He was crazed because of the medicine.
My Westie seemed to be unfazed. Except that approximately 2 weeks after using the medicine, my Westie SUDDENLY got very sick, total kidney failure!! No matter what I would have done he was not going to recover. I had to put him down.
Nothing was wrong with him - NOTHING.
I would bet a lot of money it was the medicine. I am furious and heartbroken to have lost my friend!!!