Evidence?

Buddy passed away in July.  Here is video I took a few months before that where Quaggy looks like he has bad intentions in his mind...  It's a mystery as to what happened to Buddy... is this a clue?

(By the way, it's not a clue....  I was just joking...)  According to the vet, Buddy died of poisoning.... the mystery is how did he ingest poison?  We don't put out rat poison...  don't know.