You can find out if your pet has seizures or not by observing, for how long this situation persists. In seizures involuntary movement of muscles takes place due to malfunctioning of few brain cells. Sometimes seizures attack continues if there is no interruption there but ultimately it has to end up after few minutes. High doses of antibiotics having neurotoxin potential do cause seizures because they affect neuron cells one way or the other but still chances are rare. Symptoms of seizures are:
Contractions of all the muscles in the body
Loss or derangement of consciousness
Changes in mental awareness from non-responsiveness to hallucinations
Salivation
Defecation
Involuntary urination
Behavioral changes
Non-recognition of owner
Viciousness
Running in circles
Pacing

 2 year old shitzu had ,.a seizsure..in this breed is it normal...had the first one in morning then 2 hours later another one..he threw up the second time and saw chunks of carrots plus a lot of bile..could that been cause allergic reaction