If dogs could speak and understand human speech, it could make their owners' life way easier. Finally dogs would be able to speak about the things that bother them, what makes them happy and what makes them upset and, of course, they would tell us how much they love us. Sadly they still can't say a word which puts their life into a certain risk - if dogs can't speak about good things, neither can they tell us about their problems. Luckily we are smart enough to prevent such things, and now we will share 4 sad signs you should never ignore!