Why Dies A 16 Yr Old Dog Skake. Neurological disorders can cause our dogs to feel unsteady on their feet, and head shaking can be displayed when this happens. Often, dogs will shake or shiver if they are in pain or suffering from some kind of sickness — just like we might tremble due to a cold or fever.

When an old dog’s back legs start slipping or being splayed out, it’s most likely due to one of four things: Circling behavior in senior dogs usually occurs as a result of cognitive issues or anxiety. She is much happier & active now due to a few changes in her routine.