In cats, the allele for short fur (F) as dominant over the allele for long for (f)

Complete the punnets Square to represent the cross between heterozygous short for cat and long fur cat

Sure! Here is the Punnett Square for the cross between a heterozygous short fur (Ff) cat and a long fur (ff) cat:

| F | f
-----------------------------
F | FF | Ff
f | Ff | ff

So the genotypic ratio would be 1:1 for short fur to long fur, and the phenotypic ratio would also be 1:1 for short fur to long fur.