Sentence:  He has the animal trotted, and may notice at this stage that there is an inclination to go on the toes, that the lame limb or limbs are not put forward freely, and that progression is <WSD>stilty</WSD> and uncertain; it is such, in fact, as to at once suggest the possibility of corns being present. 
Meaning of the word marked with <WSD> tags:  uneven, as if walking on stilts