Well, Emi K P, the reason why you don't like doing the fast figure drawings is because arguably you need to give yourself some time to get used to the process of quantity over quality in the figures, even the animals, yet you don't know how to handle it appropriately yet, but I think you're doing fine, therefore, you're too roughest on yourself, no pun intended. Solution, please take a deepest breath yet loosen yourself up but go with the flow.
Yet, greatest job on your hooved animal sketches, but I think your progress and process are all totally on the excellent track, but I feel that these are, though anatomically articulate, but the motion of the animation lines all seem too rigidest but stilted. Why don't you please try out doing 6 minutes of 2 minute equine poses? (3 equine sketches)
As a result, your hooved animal drawings will become less stilted and the most loosest, fluidest, but flowing yet. For most info, look into the Force Animal Drawing book on Kindle by Mike Mattessi.
My hat's off to you, and good luck.