Intrahepatic shunt or branch of portal vein?

Intrahepatic shunt or branch of portal vein?

10 month-old 50# M/N goldendoodle. Vomiting food just after he eats for the last 10 days. Good appetite. No diarrhea. Likes to eat things. Chem/cbc/lytes WNL U/S: diffusely thickened stomach wall (7.2mm). Gastritis. Reactive jejunal LN (1cm wide), Gi parasites vs puppy LN vs other.  Kidneys are big. Left 7cm. right 6.4cm. Thin left adrenal…