I just did a random search on "small medium large dog breed" and got the following definitions from the first site on the list.
Not that I would consider "selectsmart.com" an authority, but these seem like reasonable delineations to me (although I usually see the term "Giant" used instead of "Enormous").
Pocket: Under 5 lbs/2.3 kg.
Tiny: 5 to 12 lbs./2.3 to 5.4 kg.
Miniature: 13 to 25 lbs/5.9 to 11.3 kg.
Small: 26 to 39 lbs/11.8 to 17.7 kg.
Medium: 40 to 59 lbs/18.1 to 26.8 kg.
Large: 60 to 89 lbs/27.2 to 40.4 kg.
Very large: 90 to 105 lbs/40.8 to 47.6 kg.
Enormous: 105 lbs./47.6 kg. & up
What a silly debate. Labs are "medium" by the definition of the lab standard.
Dog food definitions, lab board definitions, personal definitions based on seeing only several labs do not count.
"My dog weighs xxx" is not the way you define what a breed is......LOL
Besides what does it matter?
I don't think you are using "large" and "medium" in the same way. I'm not a scientist, but my guess is that from the point of view of nutrition, "large" and "medium" will end up being incoherent if you look deeply enough.
The question is, what protein/calcium/phosphorus levels do Labs tend to need at different points of their development? Isn't it? Not whether the dogs are "large" or "medium" or "oblong" or "trapezoidal."
Per the standard, they're medium dogs...at least the ones that were bred with an ounce of thought put towards that standard.
The freakish bohemouth labradors are a completely different thing...and I don't feed Large breed dog food
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I won't feed large breed DF, even to a large breed dog. Which a Lab is not.
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I consider them medium-sized dogs, but on the top end of that scale. Just like you wrote down some large breed dogs, but labs are typically the smallest out of that group.
I think it also depends on your frame of reference with dogs. I think my boys at 2 years of age and 80# approximately are small, considering our oldest lab is 95# and just hits the upper end of the height standard. My 70# Grace looks SMALL to me.
To be honest - I thought Labs were large breed until I was owned by these two...now I am convinced they're a medium breed. Much smaller than even a Shepard...and smaller than they seemed b4 owning one!