Secretory Otitis Media in a Cavalier King Charles Spaniel.
Note the  bulging ear drum  and viscid amber coloured fluid that
escapes from middle ear when hole made in ear drum (myringotomy)

Secretory Otitis Media in a Cavalier King Charles Spaniel. Tube
placed through video otoscope and through myringotomy incision
to flush middle ear.

View into middle ear showing abnormal mucosa and some remnants
of debris.