He looks absolutely adorable. First of all, found animal need to be picked up from the street and to give him first aid – to buy, to treat parasites, comb – in General, lead to a normal form.
Often an animal that for some time lived on the street, can be infected by viruses. Viruses are different, man, they, as a rule, are not dangerous, but other animals may cause harm. So if you have house cats, and you picked up on the street kitten before you bring it into the house, show the vet.
Immediately if this is not possible, and I want to help the unfortunate, isolate temporary guests in a separate room, on the balcony (but not in the cold), or any other place where there are no other animals.