Joyce
I felt compelled to say so sorry for your loss. My 3 yo Siberian boy was just diagnosed with heart disease. Very high liver enzymes too.it was all so sudden.............. I just realized the bld testing was done the day after I applied FrontlinePlus.
I also user Heartgard Plus. My DVM really pushed the Nexgard.as did his staff.
Really try to do what's best for my guys ...........
So sad for your loss.