CSV Mixes in the US

[miran]

Any puppies sold during the "transition" period (while the new breed is being engineered (for the lack of a better term) should all be spayed / neutered when they reach the correct age.

Well not any but yes most. Only not the ones you want to use for using your word the engineering for the breed.

Every breed has it's reason and purpose and IMO the only acceptable reason to cross breed (any breed) is to create a new breed that fills a gap in the dog world. Breeding cross-breeds for money or just ease IMO is unethical to begin with. "They make good pets" is not a good reason.

Besides good pets the breed was original started for a better sled-dog.
I find a pup going to his new home with 5 weeks way to early(at the earliest point I would say 8 weeks and no sooner). And if only used for house-dog I agree with you that it is better that they all be spayed / neutered.