Today I met a man.

Today I met a man walking his handsome dog. He told me he was looking for food.

Can I say, "Hasn't he eat dinner?" or "Has he not eat dinner?" or are both of sentences not right? 

Did I make any mistake in the above sentences? (or about the above)?

Thanks in advance for your comments. 

Assuming you are talking about the dog and just making polite casual conversation,(known as "small talk") either sentence would be appropriate and correct. The only change I might make is to say "Hasn't he eaten dinner yet?"

today I met a man.

Today I met a man walking his handsome dog.(space)and this guy talked to me he told me or he said to me: "He is looking for food." (note that you don't need 'a' before 'food'; that would be wrong)

can I say:(space)hasn't he eaten dinner or has he not eaten dinner? or both of sentences are not good?

present: eat

past: ate

past participle: eaten

today I met a man.

today I met a man walking his handsome dog,and this guy talked to me:he was looking for a food.
can I say He hadn`t  had dinner.  ( past perfect)  
did I make any mistake about above sentences( or about the above)?
thanks for your comments in advance.

今天我遇見一個男人溜著他帥氣的狗，他跟(對)我說:他(牠)正在找吃的。

我可以說:他(牠)還沒吃過晚餐嗎? 或者兩個句子(hasn't he eat dinner or has he not eat dinner)都用得不好?

上述的句子有任何錯誤嗎?
先謝謝你們的回覆 。