If it has been an ongoing issue, and he is pine coning, then it's not bloated in the sense of constipation or really food related- so using peas won't do anything for him.
Have you looked at his waste? Is it brown or have you seen white and stringy at any point? is his whole body pine coning or just parts of it? The picture you had in your one thread was small, and from a distance so couldn't see much of anything to be able to tell. I am wanting to think there is something internal happening that has nothing to do with the digestive part. There is no real "mild case of dropsy".. they either have it or they don't, and if they do then if not treated is fatal- but thinking since it's been a few months, he doesn't have it. Pine coning is usually a sign of internal organs shutting down and they don't tend to live long after.. except if they are sticking up right where he is bloated at.
Are you feeding the 4 pellets at once, or spreading it out between at least 2 meals?