جَبَانُ الْكَلْبِ
One whose watchdog is timid.
This can indirectly describe a generous host: the dog has become accustomed to frequent visitors and does not bark at strangers. The inference runs from an observable condition to a social practice and finally to the intended moral quality.
مَهْزُولُ الْفَصِيلِ
One whose young camel is emaciated.
That too may suggest generosity, because milk is repeatedly offered to guests rather than left for the calf. In both cases the relevant evidence is the plausible inferential link to the intended virtue, not the mere presence of an animal noun.