But animals(dogs) were first to go into orbit!

The first animal in orbit was Laika, a Soviet space dog. She was launched aboard Sputnik 2 on November 3, 1957. The first animals in space were fruit flies, launched by the United States aboard a V-2 rocket on February 20, 1947.

I wonder whether some large asteroid hit the earth and blasted some poor animal into space some millions of years ago...

If an animal were imparted enough energy to be thrown into space, it would not get there intact.

Tiny spiders can float high enough in the air that it might be possible for some to be carried beyond the Karman line.

I may consider it largely specious that

> a qualitative distinction between humans and animals is very reasonable

but for someone who considers otherwise, such as the commenter to whom you're replying and whom I quoted, "animals didn't land on the moon" qualifies as both a sound and a valid statement.