Breeding dogs has nothing to do with discussing dosage and how it is related to small dogs of any breed or mix there of. It's body mass.
On Edit: I see you did make the exclusion for the small dog.
I had Great Danes for 30 years. With Danes if they were on the cusp of a dosage we ALWAYS went UP to the next dosage. 180 lb dog has a lot of real estate and it would be hard pressed for them to be 'overdosed' by going up one dose bracket. Covering was more important.
I never ever gave it much thought or worry.
The toy dog on the other hand has a problem with this. Give a 4 lb dog a dose that is marked small dogs up to 22 lbs.?
When they test a product, and not for the faint at heart here. One stage of testing is giving test dogs over doses to see at what point organ failure etc happens and at what dosage point they die from the product/med.
Again this is normally done on a 40lb beagle. How much it would take for them to die is not in any way shape or form related to how much it would take to kill a 4lb dog. So, the testing was done as mandated and within guidelines, comes up with the required numbers using the standard test dog, but has proven no relevancy to the 4 lb dog.
My Danes were all well above the weight of a 40 lb beagle. Large breed owners really don't have much to worry about. What it would take to kill a 40lb test beagle, most likely will not affect a 180 lb dog.
All I am saying is that these tests are done on a medium sized dog usually Beagles. Pet owners with small dogs have to be conscious of this fact and know what all the side effects are and to watch diligently for them.
So no Mark I an not suggesting testing all breeds of dogs.:R
The beagle was chosen because it WAS the average size dog and to set some sort of standards with the the FDA etc. I agree with their choice.
The results give us a "guideline" and the dogs from Medium size on up fair well with these tests. It is the small dog that needs attention from their owners as to how to use these products, because of the obvious opportunity of over dosing.
Here's just a few comments of 1,300 from pet owners whose dogs experienced serious reactions. Not related to just one brand either this discussion just happens to be about one particular one.
http://www.amazon.com/Possible-side-effects-with-Frontline/forum/Fx2ZCY3MQK9INEA/Tx2RINQTKGGPHHH/1?asin=B00006H37GWhen a dog presents with renal failure or neurological disorder and taken to the vet......the first thing out of your vets mouth is NOT going to be to you use spot flea treatment. And most likely the owner will continue administering the flea treatments simultaneous while the vet is trying to save the dog, from what REALLY was side effects of flea treatment.