SONOMA COUNTY (CBS SF) – Authorities in Sonoma County are investigating a case of animal cruelty after two horses and a dog were poisoned earlier this month, possibly from tainted cookies.

The Sonoma County Sheriff’s Office said a woman who lives near Sebastopol reported on February 12th that three of her animals were poisoned. One of the horses and the dog did not survive.

Veterinarians said the horse and dog died of oleander toxicity after performing necropsies on the animals. Oleander, a plant highly poisonous to animals, was likely placed in homemade cookies, authorities said.

The sheriff’s office said they are investigating “strong” leads on a possible person of interest in the case.

Anyone with information about the case is asked to contact the department’s investigations tip line at 707-565-2185 or the Silent Witness form on the sheriff’s office website.

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