The only reason the coat will not grow back properly is and underlying medical condition. In places like the PN where the temp is lower and the winters are cold, yeah shaving is inapporiate. But in places further south where the temps can get over 85 with high humidity if you were wearing a fur coat wouldnt you be hot?
I am also a groomer who works with a vet, yes the guard coat will grow back faster then the soft undercoat on double coated dogs (sheperds, collies, husky) and they will look scraggly for a bit but on cockers, poodles, and their assorted mixes their is not a problem.
My cocker gets is back clipped every 4 weeks (he grows like a week) and his coat comes back just as pretty each time. Did you know that most dogs should be handstripped (removing undercoat with out shaving)
When you turn away business by not shaving you are losing money.
You should check out the petgroomer forums for more info. Most groomers will do a summer shave with her a 5 or a 7 with leaves about an 1/4 of a inch so their is some coat

I am also a groomer who works with a vet, yes the guard coat will grow back faster then the soft undercoat on double coated dogs (sheperds, collies, husky) and they will look scraggly for a bit but on cockers, poodles, and their assorted mixes their is not a problem.
My cocker gets is back clipped every 4 weeks (he grows like a week) and his coat comes back just as pretty each time. Did you know that most dogs should be handstripped (removing undercoat with out shaving)
When you turn away business by not shaving you are losing money.
You should check out the petgroomer forums for more info. Most groomers will do a summer shave with her a 5 or a 7 with leaves about an 1/4 of a inch so their is some coat