How is it possible that the chihuahua could be related to the fennec fox?

In all reality there is absolutely no way a Fennec fox can be part Chihuahua or visa versa. Their chromosomes are a different number. Dogs have 39 and Fennecs have 32 so there is no possible way they would be crossed. im sorry about that but the chihuahua is part fox so that ^^^ is wrong havea nice day >^.^<