Toby is my chi and Rocky is my moms chi. They are half brothers. They both eat Ziwipeak.
Toby has a thicker, longer, softer, double coat. Rocky has a thinner, shorter, coarser, single coat.
Their father is a long coat (a gorgeous coat!) Toby's mom has a thicker, softer coat like him. Rocky's mom has a shorter, coarser coat.
So I agree that it is genetic. They both take after their moms. Toby has one long coat litter mate. The rest of their perspective litter mates have similar coats to them.
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