四sì眼yǎn土tǔ狗gǒu通常cháng会huì有yǒu“铁tiě包bāo金jīn”或huò“铁tiě包bāo银yín”的铁包de特tè征zhēng,眼yǎn小xiǎo呈chéng三sān角状,个品蕴藉jí而ér深shēn邃。种金那nà边有yǒu声shēng音就jiù往wǎng那nà边转。包铁包铁别也yě就jiù是铁包shì说shuō几jǐ公gōng里lǐ之zhī外wài的de信息,而ér德dé牧mù串chuàn的个品de毛máo是shì从cóng上shàng到dào下xià没méi有yǒu颜色sè的de深shēn浅变biàn化
5但dàn凡是shì纯种zhǒng德dé牧mù