Sorry, I had planned to post feedback earlier, but it slipped my mind.

I agree with Malte that the expression on your last Cera pic looks terrific,

especially the eyes and eyebrows. There seems to be something a little off about her mouth, however. It’s probably that Cera has a sort of “jagged” mouthline: it slants upwards from the tip of her beak, slants down, and then goes up again. On your picture, her mouthline slants up, and then is relatively horizontal.
Personally, I think your new Cera picture shows improvement in every respect from the first (with the possible exception that she is slightly less detailed in the wrinkles and folds in her skin). One other area that I think you should focus on is the legs and feet. In my opinion, these are often the hardest parts of a dinosaur (LBT or otherwise) to draw well, so no worries if you have a hard time getting them right. Just for a few pointers, the LBT dinosaurs’ feet are rounded, so even if the toes are all the same length, they do not protrude from the front of the foot an equal distance. Think of the foot from underneath as a circle with the toes stuck on one side, each pointing at a slightly different angle. If viewed from more of a side angle, the inner toes would protrude slightly farther forward than the outer toes.
A couple of other things: the front of Cera’s hind leg should probably be overlapping her body from this angle. She’d have to be turned much further to her right (facing the viewer more) for the sides of her body to appear to be in front. And her front left leg (the one furthest to the right), while probably having the best drawn toes, looks considerably larger than any of her other limbs.
On to the Littlefoot picture…
You made that in five minutes? AMAZING. I probably wouldn’t be able to draw the head in five minutes. Seriously, it’s very good. I can’t even find anything significant to critique about it.