I think OP is talking about the front arms being thick, so it looks like it's wearing child floatation devices, not the legs. It does sort of look like that. The arms look swollen, although I have never seen very young axolotls, I don't know, is that healthy?
What is a "dwarf" axolotl? I didn't know there was a dwarfism gene in axolotls. Are there pictures of adult dwarfs? Do they have full lifespans or any known health issues?