Tetracycline puppy teeth. . . . . Certain antibiotics, most notably tetracycline, can have the same effect whether given to ***** or puppy. . very young dog without consulting a veterinarian, as some drugs (like tetracycline) can harm puppy teeth. . It should never be given to young animals because it causes teeth and bone . The normal color of teeth varies, dependent on the . It can harm puppy teeth by causing permanent yellow stains. . . The puppy teeth start to loosen and fall out between 1... more