The Heartbreaking Reason You Should Never Befriend A Fox
Some great options include cooked or raw meat, tinned dog or cat food (not bones, though), peanuts, fruit (except grapes and raisins) and even cheese, per Woodland Trust.
Article source: https://www.huffingtonpost.co.uk/entry/why-not-to-befriend-fox_uk_6a635f88e4b0f1b7fc52a40e