Yes, and water. And maybe an inviting shelter.
Foxes learn quick, and can form sort of bondings with humans. For exmaple the foxes in Berlin are famous for that (Berlin has not only a wild boar problem, but also very many foxes, these are no problem). Clever adapters and opportunists they are. I like them.
Rabies in foxes is no problem anymore in Germany. But the fox-tapeworm is a big problem (echinococcus multilocularis, dangerous for humans). Thats why you maybe do not want to have a fox visiting your property and leaving droppings when you have dogsd or cats also playing in the garden, they could bring the infection inside the house and family.
Handling squirrels is much safer.
The risk that a European red squirrel carries tularemia (potentially lethal for humans) is so low that statistically it can be ignored. But wild rabbits and hares are something different, i would never easily make contact to a wild rabbit in the park without precautions taken. And why even then?
The only risk you take when handling wild squirrels, is a certainty: fleas.
And different to common belief they sometimes
do jump over on humans.