Humans are plantigrade – we walk on our full foot (heel to toe). Bears and skunks are also plantigrade even though they walk on all 4 limbs.
Digitigrade animals walk only on their toes. These include cats and dogs. The ‘crook’ in their rear legs is actually an elongated foot where the heel does not normally touch the ground except when resting.
Unguligrade animals include horses and they walk on the tips of their toes (i.e. their toenails).
For the purposes of fursuits, the difference between plantigrade and unguligrade is slight and ignorable and generally all suits are classified under ‘digitigrade’ or ‘plantigrade’ regardless of whether the costume has hooves or claws.
The except is ‘hoofboots’ (boots with a permanently raised heel and very high sole) which more accurately replicate the unguligrade condition but we do not make these as they can be rather dangerous and uncomfortable if done incorrectly.
