Barium for mega-esophagus?
And don't freak if it is mega, if your dog is good health and weight they will live long healthy life (I've had 2 mega dogs so know what I'm talking about). But it would explain what you are seeing.
MACH3 Bretta Lee Wildhaus MXG MJG MXF MFB TQX HIT CGC TC
Glory B Wildhaus AX, AXJ, XF
plus Miss Osin Blue Wildhaus
"Nothing new can come into your life unless you are grateful for what you already have. ~ "--- Michael Bernhard, gratitude