This will depend upon the circumstances in which your puppy was foaming at the mouth.
I would start with, what breed is your puppy? Certain breeds, such as St. Bernards, will naturally create a lot of saliva that can turn into bubbles and look like the puppy is foaming at the mouth. This is natural and will continue for the rest of the dog's life.
Second, was your puppy highly excited at the time? The more energetic your puppy is, the more likely it is that he/she could create saliva bubbles. This is also normal, and will go away when your puppy calms down.
Third, was your puppy out exploring on his/her own without supervision? Puppies can try eating things like toads and noxious plants that can cause excessive salivation; if the bubbles don't stop within a half hour, call your veterinarian for more advice.
Fourth, is your puppy showing any other signs of illness, like harsh breathing sounds, vomiting, diarrhea or lack of energy? If so, this may be a medical emergency and I would suggest a trip to the veterinarian immediately.
Fifth, and highly unlikely, your puppy may have rabies - foaming at the mouth is a classic sign of this disease. If this is the case, you need to take your puppy to a veterinarian and it will probably die in the next couple of weeks. You need your veterinarian to collect samples to test for rabies if this happens (the testing is free, incidentally) so that you and your family can be treated for exposure to prevent you dying from rabies as well.
The Dog might have eaten a bombardier beetle, been stung by a scorpion , eaten some detergent, or worse. What is almost guaranteed is some sort of irritant has gotten to into his mouth and the foaming and shaking is the puppy trying to expel the irritant. I recommend a visit to your vet, but keep a very close eye on your puppy for anything that might suggest poison, like loss of balance, seizures, dilated pupils, etc
Foaming at the mouth is not normal in any animal ! Get it to a vet - NOW !
No. If you are foaming, see your doctor.
When someone or something is foaming at the mouth, it is usually a sign of rabies. They should be taken to a doctor.
Dog has rabies/
When it's not foaming at the mouth
Rabies
Very carefully take your puppy or dog to the vet. The main cause and the most feared cause of foaming at the mouth is the extremely infections rabies. Do not touch the foam, clean up after the dog and get it to an emergency centre right away. Other causes are medication side effects. This may also need to be looked at by a vet. Anxiety, poisoning and motion sickness are three other causes of dog frothing, again, which require a vet to examine the dog.
No, foaming out of the mouth are signs of a bacterial infection.
Foaming at the mouth is NOT an actual sign of rabies. Most likely scenario is that the wolf that is foaming at the mouth has just run very fast or very far, causing it to salivate.
Foaming at the mouth (or some other aperture).
Take him to a vet ASAP
it has rabbis