My puppy is throwing up white foamy stuff, what is it? What is wrong with him?

Get him to a vet asap!

How old is he? Did you just get him? Has he had all of his shots yet? I agree with Wondergirl! To the vet ASAP!

Ummm I wouldn't know but I know I would definitely take my dog to the VET!!

Just a few other questions. Is your dog eating and drinking normally? Is he alert or is he seeming to be lethargic? Has he had normal bowel movements with no changes, and has he been peeing as usual? Have you recently changed his food?

I have had the same problem with my almost 6 month old boxer the past couple of days. Wednesday she was fine until that evening and I found out my sister in law fed her a lot of pork skins that she had. Could that be part of the problem? She drinks a little during the day but seem much worse at night and won't eat anything now. I haven't been able to get ahold of the vet she see's but still trying. And is also vomiting up the white foamy liquid, but not as much as she was before.

found out my sister in law fed her a lot of pork skins that she had. Could that be part of the problem?

I'm not sure if the pork skins is a part of the problem but it is an interesting thought. I know someone who's 3 year old French Bulldog throws up white foam anytime he eats a pork skin product. I would definitely suggest that both the OP and angelkiss bring their dogs into the vet ASAP. If it is something more serious like parvo then time is of the essence. I would suggest possibly asking your vet about any connection between pig skin and vomiting while you are there.

Need to know the age of the puppy and was the foam pure white or did it have any food or more importantly grass in with it?
My dogs throw up on occasion just from upset tummies but the oam is usually yellowish and more often that not has grass in it as they eat grass to try and settle their stomachs.

If your puppy is acting in any way lethargic, or seems sick in any way get it to a vet.