These are the typical symptoms of eclampsia in dogs:
Confusion and disorientation
Collapse
Difficulty walking and/or drunken gait (ataxia)
Fever
Muscle stiffness or tetany (involuntary contraction of muscles)
Restlessness (often displayed by pacing and/or whining)
Tremors, twitching, and/or muscle spasms (from mild to severe)
Weakness