* The genotypes of the parents: What are the alleles for coat color that each parent carries? For example, are they both heterozygous (Aa)? Is one homozygous dominant (AA) and the other heterozygous (Aa)?
* The inheritance pattern: Is the coat color determined by a single gene or multiple genes? Is it autosomal or sex-linked?
Once I have this information, I can calculate the expected frequency of agouti brown offspring in the litter using Punnett squares or other genetic tools.