Answer:
I would primarily need to know about the narrow-sense heritability of the trait for the local squirrel population. Where the gene for bushy tails lie, whether it is a dominant trait or a recessive one. This mainly has to do with what fraction of variance in phenotype can be as a result of additive effects of gene. Once this information is known, I could breed pet-squirrels with bushy tails or even any other desirable trait requested for.
Step-by-step explanation:
Hope that answers the question, have a great day!