Food safety
Can dogs eat onion, garlic, leeks, chives?
No — don't give this
The whole allium family damages red blood cells, raw, cooked, dried or powdered. Watch out for gravy, stock, curry and leftovers.
If your dog has already eaten it
Signs can take days to show. 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