Why are my 1-week-old piglets vomiting yellow foam? What can I do?

Vomiting is serious in pigs. You need to call the vet for a visit. This could be a viral infection, bacterial infection or a gastro-intestinal problem. Take their temperature if you can, and tell the vet on the phone. They will need an exam.

There are many things that can cause vomiting in pigs. I suggest you just hold him off food until you can get her seen by your vet. That way his stomach can rest. Have water available for him to drink but don't force him to take in water.

Without knowing more information about your pigs, it would be hard to tell. Pigs can foam at the mouth in anticipation of eating, and may foam or get excited as you are placing their food, especially younger pigs or piglets. Boars can also foam if there is a gilt/sow in heat nearby that is exciting to them. However, if they are showing any signs of illness such as decreased eating, pawing at their mouths or the ground, lethargy, weight loss, behavioral changes, etc, the foaming may indicate something underlying such as a virus, injury to the mouth, bacterial infection, or toxicity that should be checked out by a local vet.

Bacon should be examined by your veterinarian to diagnose illness or injury. Once a diagnosis is made, the appropriate treatment can be administered. Do not wait to see if he improves. Dehydration is a very real concern that can complicate any underlying condition.

As you probably already know if your pigs are sitting there quietly when you try to do something to them then it's safe to say that something is probably very wrong. I would first try and get us a temperature on them see if they are carrying any sort of fever and I would also look to see if they have any sort of skin lesions. Regardless of what the cause of the current problem is I'd say that it is probably not safe to eat or butcher these animals at the moment. You can contact a local veterinarian that deals with swine and see what they think but in all likelihood they will probably want to administer an antibiotic. If they do then you will have to wait the withdrawal prior to butchering and selling these animals for meat. I would also be curious to know if they have any sort of diarrhea as many swine illnesses cause this.

The piglets should be weaned by now. Do not let them suckle her anymore. By now they have teeth and will injure her teats which can then develop mastitis (inflammation of the mammary glands). Redness, pain and not eating, weakness, are all signs of a severe mastitis and she will need to be seen by a veterinarian. Your vet will likely prescribe anti-inflammatory medication and, if there is a bacterial infection, antibiotics.

Poor Baby! I would strongly recommend to have a vet take a look at her. At this age, she is very fragile and could have develop a serious bacterial or viral infection that she needs treatment for. If left untreated for too long, it may be much harder to treat or possibly even fatal with her young age.