If in doubt, always call your vet or the Animal Poison Line immediately.
Fried foods combine high fat with often high salt and seasonings : all harmful to dogs. Regular consumption leads to obesity, and a single large portion can trigger acute pancreatitis. Chips, fried chicken, and battered fish are common culprits.
Monitor for signs of pancreatitis. Keep to a bland diet for a day and contact your vet if symptoms persist.