No, dogs doesn't get into the trash all the. They are well trained and I won't take it easy on them if they get into the trash. I feed them very well, so they shouldn't get into the trash. 

You have to put in much time into training your dog to make it understand that going into the trash is not something that is good. Once you are rewarding your dog for not getting into the trash, he will know that it is not a good habit and it's going to stop it. 

I remember one of our neighbour's dog doing this all the time. He will leave them in his frontage but before he will come out to check on them, one of them would have scattered the trash. He started keeping the trash out of their reach and he had peace.