Is The Toy Or Miniature Cocker Spaniel A Different Breed From The American Or English Cocker Spaniel? In Other Words Is The Runt Or Small One Of The Litter Considered To Be A Toy Or Miniature Cocker Spaniel Puppy?

Yes. There is no recognized breed standard for miniature American/English cocker spaniel's. These dogs are usually the runts of the litter, that are sold as miniatures to unsuspecting buyers. Usually animals that are between twelve and fifteen lbs are considered miniatures.

The method for breeding these is simple. The smallest runts of the litter are bred together to create a smaller dog, and breeders keep repeating this practice to see how small they can actually get. As a result of this, these dogs are not well fed, well kept, and usually have a host of medical problems and genetic faults that come to light after the buyer has already purchased the animal.

It is also dangerous to breed females that are smaller than the standard size as there is no guarantee that they will be able to deliver a litter without dying themself. No responsible breeder would breed miniatures as this is an unethical practice.

I would have to agree with Getvet. Any time you have a runt this is only considered the "runt" not a toy or mini. Any one trying to tell you this is not being honest. If you want something smaller than a cocker spaniel, you should look at the cavalier king charles spaniel, they are very sweet and very affectionate.
Any time you buy a dog, whatever the breed always research the breed and breeder, this is your money spend wisely.