Pugs, despite the modest sizes, possess really proud, and sometimes and aggressive temper, especially it concerns dogs. Until to your friend year was executed, you can quietly and fearlessly admit to it large adult dogs "to get acquainted". It is even recommended as communication with other dogs is obligatory for normal development of mentality of an animal. You do not want your dog in the future to be afraid of all and everything, just because never in the childhood close faced other dogs. If you at a meeting with other dog do not see signs of aggression, then quietly stand nearby, let "are smelled" especially as for adult dogs your puppy is harmless as the rival and he will never become an aggression subject for other healthy dog.
I will make a reservation once again, for a healthy dog, that is not with foam at the mouth rushing and growling, namely an ordinary dog, even street. The majority of adult dogs with pleasure play with puppies and help them thereby becomes friendly and sociable, but not coward and cautious. Puppies can cause aggression only at oshchenivshikhsya females. Therefore be attentive and try to keep out adult females, especially if at them mammary glands are pronounced.
Also it is not recommended to walk, for the same reason, in habitats of dog packs, can be oshchenivshiyesya boughs there and it can provoke attack on you and your pet. After a year, your puppy will become almost adult dog and can begin to show aggression on larger males as he happened to mine. It, of course, from outside always looks comically, but can be dangerous if other dog not on a lead. Probably, indeed say that pugs in soul consider themselves lions as in case of excessive familiarity from larger dogs fearlessly rush in a fight, growling and sticking out the proud breast.
I had to drag the Lev from the dumbfounded by such behavior, large dogs more than once. Cats can constitute one more danger to a pug. They can accidentally wound eyes of your puppy and as eyes and noses of a pug their sore points, it can lead to long treatment of various infections. Why I started talking about cats. It would seem, cats and dogs not especially get on and cats should not approach close the walking dogs, but we speak about pugs. The fact is that on an extent it is more than 6 years I, walking with the dog, often noticed how cats follow us till several quarters, some approach close and try to smell. Several times the same cat ran up and licked my dog in a muzzle. Perhaps, cats take pugs for the fellows who know that at them on mind.
It would be desirable to tell several words about toys for puppies. Be careful of the crumbling soft balls and animals pugs can just nibble it in dust and as we do not know authentically that material of such toys is safe, it is better not to buy similar things. And very important point - about one year do not play with pugs in pulling, that is do not select at them from a mouth kerchiefs, rope twisted toys, it seriously deforms a bite of a dog and can lead further to the wrong development of jaws.