In order to produce a chocolate pup there are a few different options.
If both parents are chocolate this will guarantee you all chocolate puppies.
If both parents are chocolate carriers you may possibly get chocolate pups in a litter.
If one parent is choc. and the other is a choc. carrier you may possibly get chocolate pups.
If only one parent carries or is choc and the parent is not choc. or carries choc. you will not get any chocolate puppies. These puppies should be chocolate carriers.
This is the only way of producing chocolate pups.
In other words, both parents must be chocolate or chocolate carriers to produce choc puppies.
Most colors are dominant to Chocolate. A chocolate can not have any black hairs or nose. A chocolate will always have a liver nose and usually hazel or green eyes.