Delma Park in Etobicoke, Ontario.
The sicko is using Rat Poison, found at necropsy.
The Police are NOT investigating, as Park Employees found no evidence.
Keep your dogs on leash until this is over, IMO.
We had a similar poisoning about 4yrs ago, that sicko used pieces of hot dogs laced with Rat Poison and nobody was ever charged.
A young Cavalier, onleash, died after grabbing a piece and swallowing it before the owners could get it away!!
Many were in the vets for weeks.