nice work with those last few. As kiwigarbage says it is good to get the general shapes down first to see any obvious differences in proportion. The Biraffe is awesome, although one thing I've noticed is that the back legs are different lengths. The "knee" of both is the same height from the ground but one is at an angle, so when straightened would be a fair amount longer.
I try to draw and then when I'm almost finished I compare things that should be approximately the same length in the same position.
Its all looking great apart from that little thing though. The fruitrate is great too - very original