Amarasaurus inspired, I presume?

Maybe. I can't quite remember what I was thinking... I should attempt to draw more dinosaur-like dinosaurs. Get into something more real and develop better feet than the mammalian ones.

With a little alteration to your style, they work for the rear feet for sauropods, stegosaurids, and ankylosaurids. Just need more toes.
Front feet for those animals are a little less elephantine.

Important rule to remember, for these types of dinosaurs, the anatomy of their feet are very simular to elephants and rhinos. They walk on their toes, and their feet have thick pds between the bones and the soles of their feet.

For the herbavores like the hadrosaurs and iguanodonts, their back feet are more like an ostrich, while their front feet are almost like a horse's hooves.