Baring weight

my son is 7 months old tomorrow. I'm a bit concerned because he hardly bares any weight on his legs. I've seen two different docs and the one said to give its month and see. The other doctor told me that she wasn't alarmed based on the fact he was great in other areas. Just went out and bought a exersaucer ...to add to the millions other toys he has I mean I thought the jolly jumpers was the same?? Confusing but anyway I'm just trying to do some of my own techniques too. He's not doing it for long and his toes are pointer in. I'm just wondering if anyone else has ever had a similar situation. Thanks for any advice