I have a 13 week old cockapoo. He's not allowed out for walks until Thursday, but we've been taking him out by carrying him so that he gets used to different people/animals/outdoors etc. but I've noticed he seems to bark and growl whenever he sees young boys, but the strange thing is I have 2 sons myself who are 8 and 9 who he absolutely loves, so I'm not sure why he's doing it. Any tips on how to try and stop this behaviour? Whenever he sees boys walk past the window, he barks and growls and does seem a little aggressive, more than playful.