11 Foods Your Pet Should NEVER eat By Sherry - Jun 8, 2016 3132 Share on Facebook Tweet on Twitter tweet 5. Macadamia Nuts Image: Courtesy ofRichard Ashurst via Flickr (CC by 2.0) Macadamia nuts can cause vomiting, hyperthermia, tremors, depression and weakness usually within twelve hours and symptoms can last for two days. Keep all nuts out of reach of your pet. PREV6 of 12NEXT