Gourmet liquid ant bait has the toxicity of table salt. It contains an ingredient that is a mineral similar to Boric Acid. The concentration is very low. IF the cats consumed or drank it, it could make them sick IF they consumed enough. It would be like a drinking a glass of salt water to them. If they drank enough, then use, it will make them sick.
We have never had a report of harm to pets caused by Gourmet Liquid Ant Bait. The KM Ant Pro Dispenser is only a dispenser, it is not th bait.