A Donkey should be in good weight with ribs just palpated under the coat without appearing "Ribby". A well-muscled animal will show optimum conformation.
An animal in poor condition - either underweight or obese - is difficult to evaluate and can often appear dull and lethargic. Signs of poor condition may indicate or contribute to ill health. An animal in poor condition, even if structurally sound, will give a poor impression.