Welcome to Betta Fish!!
Thanks for posting pics... you have some very nice fish!!
Your second fish looks bloated so you want to look into that and treat him for it... it could be a number of reasons.
Also, his bowl looks TINY... you might want to consider getting him better accomodations or at least ensuring you're keeping the current one in the best condition possible.
Have fun in the forum, there's a lot of great information and people here!