The two dogs appeared sick on Tuesday and Parsons took them to the after-hours vet on Tuesday night. They had to be euthanised on Wednesday.
"They were the kindest and most beautiful dogs I've ever seen. Their hearts were filled with so much love for not just each other but everyone around them," Parsons posted on Facebook in a tribute to her dogs.
"This is now a warning that some heartless person had come onto my property and given my dogs some form of poison and with this they have passed away. Please share this to as many people you can to let dog owners know this cruel heartless person is out there. The police have been advised and I hope they catch you."