I had a series of seizures and was rushed to the hospital. What is the cause of this?

A seizure occurred in the middle of the night and Sora rushed to the hospital. The doctor also treated me well. I was anxious for a long time, but at the end I went to bed with peace of mind next to my favorite daddy. I'm glad nothing happened. I'm grateful to my dad.
It's a program about Sora, the signature dog of the moon sea!
The Golden Retriever is a 10-year-old boy.
The playlist is here!
Uncle Duo's Dinner List bit.ly/38wpC4C
DIY list to live with Sora bit.ly/3NSHAOM
Sora's Fun Life List bit.ly/3KdexDt
Sleep~Isora's Bedtime List bit.ly/3ucM7E5
Essential daily care list bit.ly/3ucIi1x
Sora's Walks and Outings List bit.ly/36TUyLM　
A simple discipline list that anyone can do bit.ly/3DJChMS　　
List of necessary items to live happily and healthily bit.ly/36ZfbWP　
Tsukiumi's Signature Dog Sora List bit.ly/3r2FYZe