Could it be translated like: "This small cow"?
Nope, that would have to be "Bu küçük inek" :)
I think yes. Small means küçük . little means Az
why is a 'small' cow incorrect?
Would "Bu bir küçük inek." be correct?
"bir" is almost always placed right before the noun. It feels like you're saying "little a cow", but you'll get used to it.
Can it not be "a young cow"?
So, how can we write "this cow is little?"
There is no "is" in TR, so you'll just say "this cow - small." --> Bu inek küçük.
Why is it not " this little (one) is a cow"?
is there a turkish word for 'it'?
Yep, "o." "O" can also mean he/she/that
Small cow is correct