They can have 3 or 12 pups but average for a cocker spanial is 6 or 7
Mine had 4
Normally dogs breed 6 puppies but in the little dogs this number is decreased and it comes down to 1 to 4 puppies. So in your case the probable number of puppies which you'd have is 4.
well are cocker spaniel had 10 healthy puppies on a Christmas and they were adorable even though they were half chihuahua so 10 is are limit and she is or was 4 when she had them so good luck and they all went fast