Your dog needs to be examined by a veterinarian. Infected teeth do not resolve with anti-biotic treatment. Typically by the time you are seeing the infection--blood, pus, very smelly breath--the infection is at the tooth root and it needs to be extracted. Chihuahuas are prone to dental disease and need dental cleanings yearly. I suspect your dog has more than 1 bad tooth that needs to be extracted.
Never give medication without consulting a veterinarian. I doubt the feed store dose of Amoxicillin is correct for a small Chihuahua.
Your dog had an allergic reaction to something--it may be the Amoxicillin or could be unrelated. Anaphylaxis (severe shock) can be life threatening. A main sign of this is trouble breathing.
He needs to help of a veterinarian--the best thing you can do is get him in for an examination and appropriate treatment.
Never give medication without consulting a veterinarian. I doubt the feed store dose of Amoxicillin is correct for a small Chihuahua.
Your dog had an allergic reaction to something--it may be the Amoxicillin or could be unrelated. Anaphylaxis (severe shock) can be life threatening. A main sign of this is trouble breathing.
He needs to help of a veterinarian--the best thing you can do is get him in for an examination and appropriate treatment.
