At times I notice a lump either side of my 3 month old pups stomach, either side just at the bottom of his rib cage.  They move when touched and are not always noticable - i have just noticed them now after his lunch.  Will they just be part of his internal organs?  He is reasonably slender.  It could be something he has eaten - but they are on both sides.  Does anyone know what this is?

Hi possibly the floating ribs that are at the end of the rib cage are more prominent when he has a full stomach.

Hi, thanks. That makes sense.