These guys really need names, if only because I can't keep calling this guy 'the Brother'. For now we'll called him Arren.
Arren's a big man in the tribe. He's one of their best hunters, one of the few who has earned the right to hunt alone. It's not that he's a loner, he just needs to get away every now and again. Just himself, the prey, and the plains for a battleground.
This one went down with a minimum of fuss, but Arren managed to bite his own lip during the struggle, which may explain why he looks so annoyed.
I think this 'furry vs. fantasy lizards' thing stems from a deep-seated bias in favor of all things fuzzy, be they hoofed or pawed. That and it's easier than drawing bison. There's a whole freaking essay about my methodology with this, and I don't think you need to read that now.