Come on, you have to do better than that. 
Some closer up photos please.
A photo they have dinner please.
A photo you play with them please. 
If they always come for food, and you want them to come inside, the best course of action is to put the food at the doorstep. After they get used to it, then move the food right inside your door. After a while, move the food further inside. They will have to come inside for food if they want a free meal. They can't possibility all be that shy. If one comes in and have a chew, the rest will eventually come in too.
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