Hello, I'm sorry to hear that Papash is vomiting and I'd like to help.
What do you think it is?
What you are describing sounds like normal mucous from the stomach. The stomach lining is covered by a thick layer of slimy mucous to protect the stomach lining from the acid in the stomach, which is used in the digestion of food.The most common reason for vomiting is eating something he should not.
This includes rawhides or bones flavored or not, table scraps, foods he is sensitive too (food allergies happen in dogs too) or that are too spicy for him.
So this is something that is normal for this breed or all dogs?
The mucous is normal but dogs shouldn't vomit regularly. Unlike cats, that do vomit with some regularity because they do ingest hair when grooming, dogs only vomit in response to stomach irritation.Other causes of intermittent vomiting are chronic pancreatitis, inflammatory bowel disease or organ disease of some type, rarely parasites can lead to vomiting.
So I'd be very careful with his diet for the next month or so, dog food only, no bones, treats or tables scraps and I'd make sure he's eating at least twice a day. You don't have to feed more just split his food into several meals.