hi we are getting our new pup in June , but we have lots of stray cats around that often sleep in our garden & poo i must admit i do leave out milk & food leftovers etc for them as they look half starved but would they cause any harm to the pup when we get him as he wont be fully vaccinated yet could he catch anything by playing out in the garden during the day as he will be sleeping indoors at night . any advice would be great thanks