Dad has 2 arms and 2 legs. Mom and Junior each have 2 legs but no discernible arms. Not sure what species any of them are supposed to be (although presumably they’re ants with 1/3 to 2/3 of their limbs missing). If Kenny isn’t adopted, he’s most certainly severely deformed. (Of course, even if he is adopted, he could still be severely deformed.)
Dad has 2 arms and 2 legs. Mom and Junior each have 2 legs but no discernible arms. Not sure what species any of them are supposed to be (although presumably they’re ants with 1/3 to 2/3 of their limbs missing). If Kenny isn’t adopted, he’s most certainly severely deformed. (Of course, even if he is adopted, he could still be severely deformed.)