The reasons why Corgis vomit yellow water and foam:

1. Corgis will vomit yellow foam when they are hungry for a long time, swallow foreign objects, or eat improperly. .

2. Corgis will also vomit yellow foam when they suffer from gastrointestinal diseases or gastrointestinal inflammation.

3. Corgis will vomit yellow foam when infected with parasites, which is more serious.

4. When Corgi is infected with viruses such as parvovirus and canine distemper, it will also cause vomiting of yellow foam.

Solutions to Corgi vomiting yellow water and foam:

1. When it is caused by improper diet, you can give Corgi food specially designed for pets to regulate the gastrointestinal tract. Medicines, like probiotics and the like.

2. When Corgi has gastrointestinal diseases, you can give Corgi appropriate medication and feed the dog regularly to regulate its gastrointestinal condition.

3. If it is caused by parasitic infection, the Corgi must be dewormed promptly and regularly.

4. If it is caused by infection with viruses such as parvovirus, the owner should take the Corgi to the hospital for treatment immediately.