Just about everything seems a bit off. If you're going to scale size to bipedal heights it's probably better to have a list of smallest to largest animals and go from there. Considering the varying anatomies you'll probably want to arrange by weight. So that would go along the lines of

Rodent
Small felines
Small canines
Medium Canines
Kangaroos
Large Canines
Large Felines
Horses
Cows

Average male human height is 5'8", so I'd assign that to the medium canines as a base and have individual measurements vary about 20% in either direction within a group, and maybe nudge each 'step' up by about 4 inches, making each tier significantly larger or smaller, but still keeping a humanish range, since we have several orders of magnitude difference in the mass of the smallest rodent and the largest cow. Assuming for the typical 20% variance in a population without exceptional circumstances (more than 20% lower height is dwarfism and more than 20% above is giantism) we get the following:

Lowest Normal - Average - Highest Normal

Rodent 3'11.5" - 4'10" - 5'9.5"
Small felines 4'1.5" - 5'2" - 6'2"
Small canines 4'3" - 5'4" - 6'5"
Medium Canines 4'6" - 5'8" - 7'1"
Kangaroos 4'9.5" - 6'0" - 7'2.5"
Large Canines 5'1" - 6'4" - 7'7"
Large Felines 5'4" - 6'8" - 8'
Horses 5'7" - 7' - 8'4"
Cows 5'10" - 7'4" - 8'9.5"

I made small felines only slightly smaller than small canines, since they tend to be relatively the same size, but similar 'height' dogs tend to be more heavily built than the felines.

This comes out to a pretty accurate and plausible range for each of the anthro critter types, considering that those heights don't surpass the outliers for largest (by an inch and a half) and smallest (by two feet) adult humans ever recorded. Of course there would need to be a bit of alteration in muscle and bone structure, since the human biology isn't really meant to scale up that big. It starts to get pretty derpy up in the 7' region. But I could easily see these heights being scientifically plausible.

Thanks for the work you put into this, I'll prob be using the average ranges.

No problem. It's nice when I can put my A's from a decade ago in high school math to good use.

awesome and thorough job :3

Oh by the way; what about dragons?

What's the weight of the typical feral dragon in the setting you're using?

Um, I'm not really sure, never met a dragon in real life...

Then I'd say stick to the cow height.