> The parent still considers them 'wild' despite providing alternate food source which changes their behavioral patterns.
Who says this is changing their behavioural patterns? Maybe native people in north america have been randomly feeding grey squirrels for thens of thousands of years.
Maybe for longer in Eurasia?
In fact if it weren't in the animals behavioural repertoire to recognise the opportunity of taking food from people, then we wouldn't even be able to get them to understand.