Help please!! Condition and Muscle.... *pics*

[nemo_]

This is my boy:

(Please excuse the terrible mess in the backgroud! )
Those are the most recent pics I have of him, taken about a month ago, and he's still in a similar condition. I want to get back showing, but am pretty sure he's not really in the best state to be doing it sucessfully! He's plenty fit enough, and is currently working very well, actively from behing etc. But he doesnt appear to have much muscle... what do you think? Especially on his bum, have no hills (!) , I have a dress circle pessoa off ebay, so was thinking might get it out?
He appears to have a but of a pot belly, but skinny around his hips... grass belly? He's due to be wormed in 2 weeks. Also, in the second picture, he has a slight kind of ridge on his belly, when he stretches... what is this?
Sorry it's so very rambly! I don't want to seem like a numpty either... just not sure and haven't been able to see RI recently so can't get her opinion. Any cc welcome too
Thanks for putting up with me! Can offer chocolate mousse for getting this far?

 

[somethingorother]

I think a lot of it is just the way he is built. I wouldn't want any more weight on him but i don't think he has a pot belly and his topline looks ok. That ridge is just his muscle as far as i can tell. He looks in pretty good condition to me really. Not that i'm any sort of expert lol

 

[Jingleballs]

He's not looking to bad - some lunging on hills or with the pessoa should help improve topline but he's by no means too poor looking to show IMO.