Genesis 2:19 & 20
"Now the Lord God had formed out of the ground all the beasts of the field and all the birds of the air. He brought them to the man to see what he would name them; and whatever the man called each living creature, that was its name. So the man gave names to all the livestock, the birds of the air and all the beasts of the field. But for Adam no suitable helper was found." NIV translation
In the previous passage, God had said that it was not good for the man to be alone in this world. Here, God brings all of the living creatures of the earth to Adam so that he could name them but also for another reason. God is not surprised by anything and so He knew that there was not a suitable companion among the animals but Adam had to see that for himself before God created the woman. As a pet lover, I can understand the affection between an animal and a person but, as we see here, that cannot replace the companion that God has created for each and every one of us. There are those who have settled for a pet instead of the helpmate that God has created for them and that is sad. God wants the best for us and that best includes the man or woman that He has created for each of us. Nothing can replace the wife/husband that God has created for you!