The healthy ideal weight for a Miniature Schnauzer Female dog is between 12 lbs to 18 lbs.
For a male Mini Schnauzer the ideal weight for a Miniature Schnauzer male dog is between 12 to 20 lbs.
Male Miniature Schnauzer dogs typically weigh just a slight bit more than the female Miniature Schnauzers.
As long as your Miniature Schnauzer dog is at least 12 to 18 lbs in weight then they are likely a healthy weight as the dogs can weigh different amounts.
If the dog is not gaining enough weight then you should take the dog to the vet to be checked out for a possible illness that could be deadly.
But as long as your dog is gaining weight properly then there likely is nothing wrong with it.