Food safety
Can dogs eat macadamia nuts?
No — don't give this
Cause weakness, wobbliness, tremors and vomiting, often within twelve hours.
If your dog has already eaten it
Call your vet.
Being honest about this
Dogs differ, and amount matters — a crumb of something rich is not the same as half a packet. Treats of any kind should stay under a tenth of what your dog eats in a day. If you're unsure, your vet would far rather take the call.
Based on guidance from: Toxic food guidance for dogs — Animal Poison Line / VPIS
Sources & methodology