WOW, I can't EVEN BELIEVE you call yourself a breeder!
I am appalled! When one is in any kind of business, such as being a vet, yes the objective is to make money, HOWEVER, being a breeder it YOUR responsibility to take the advice of your vet ALONG with the education you have and make ANEDUCATED decision on how to raise your puppies and adults!
If your vet just wants money, FIND ANOTHER ONE! You have gone beyond the point of WANTING to learn. I realize what we used to do back in the day, but through modern technology and current medicine, new things evolve. For you to raise your puppies & adults the way it used to be, is hurting your breeding program, I suggest you do more research and LEARN things change!
I own an auto body repair facility, and years ago cars were painted with enamel & lacquer. Since then, technology has changed, now cars are base coat, clear coat. So you change with the flow, yes you can still use that nasty enamel & lacquer, but why, the new way is so much better and safer for the environment and my employees, so that is why I choose to change, not that I had to, but if a way is better, I am all for it!