Word definitions
dore: oldish beast (in a herd of cattle)
bvupa: bone
Translation
One known to swallow the (tough) meat of an old beast, choked on the bone of a calf.
Inspiration
Even though a young animal has more tender meat, compared to that of an old animal, one could still choke on its bone.
Application
One should be careful not to underestimate certain things simply because they seem less challenging than prior accomplishments.