Will Falconer, DVM Moderator
Hi Ray,
I'm so sorry you lost Sammie. Drugs that poison by way of paralysis of the pest (which all the HW "preventatives" I've studied do) won't surprise us when we see nervous system symptoms in our beloved animals.
Those could be mild, like tics and tremors, to severe, like seizures or paralysis. And, as Sammie showed us, the interval of when the side effects show up can vary all over the map. Some right away, even some deaths after the first dose.
Sammie held out for 5 years (strong, vital animal!) until he no longer could. I'm so sorry for your loss. And hope Sammie can inspire you and many others to think differently about truly protecting our animals from pests. The key is how we choose to do that.