This food is not «poisonous», per se — it will not result in immediate kidney or liver failure — but it can cause long term health problems for several reasons. (petconsider.com)
Please contact your veterinary surgeon for advice immediately upon ingestion as prompt action may be required to prevent long term health problems. (vets-now.com)
There are a whole host of parasite prevention drugs, unfortunately they are all full of toxic chemicals which can cause nasty side effects and even long term health problems. (raisingrascal.com)