well the best thing really to do is to train your dog just to ignore the cat .. don't let your dog sniff it or go near it and your dog should not eat the cat once grown up and if for one day the cat ever comes around and decides to take a sniff at the dog.

and if your really wanting your current dog to get along with cats your best option would be to get a new baby cat and make the dog and baby cat cuddle together while they grow up and like I said maybe the other cat may come around after awhile.. but takes time and majority of the time never happens..

cats are one dog cats.. they may become friends with a dog but not all dogs.. where as dogs will become friends with all dogs not just one..