We feed our Mugsy (16 mos old male) only Blackwoods dry with a little IAMS wet 2x per day. We have ruled out food. He vomits only at night and not every night. Usually the consistency of oatmeal but can be whole kibbles. Read about Pyloric Stenosis but since he only vomits at night after going to bed it makes me wonder. Tummy not distended or hard and doesn't hurt. No poop issues either. Otherwise he's fine. Any suggestions?