Have you ever met someone with a dog, who said:” Oh, let them get to know each other, they are so cool sniffing each other…” ? Did you let your dog snififng other dog, which you do not know? Maybe it is not so cute, as it looks like. You have to be awared, that dog’s viruses can be transmitted on different ways, such as:

• Direct contact (sniffing, licking,…)
• Direct contact through open wounds
• Insects and animal bites
• drinking contaminated mother’s milk
• Eating contaminated food or drinking contaminated water
• Breathing airborne viruses

My first suggestion is, to use a common sense. It is very important to supervise your dog as much as possible, when he is still a puppy. Supervision prevent your dog to get in direct, close contact with unknown dogs, or contaminated food or drink, which can prevent unnecessary problems. Even when you know the dog and the owner, it is still not completely safe. Letting your dog unsupervised untill he is raised could not only affect dog’s health, but could also influence on his behaviour.  And again, use common sense.