Broken ribs? Possibly a feeding probleM?

Firstly, last I weighed my BP, he was around 180grams. the last two mice I fed him were 30 grams a piece. This time they didn't have any big ones so I gave him two mice, 18 and 16 gram apiece. Is that okay? 34 grams for a 180g bp? He's approx 22inches long. Not fat, not skinny.

After he ate he was acting sort of weird, shaking and extending to the height of the tank (he usually never shakes) and then I noticed few bumps few inches above his tail. I'll be able to post pics in few days after he's done digesting, but still it's worrying me. He had two weird bumps...as if bones were broken and sticking into the skin that created the bump. Could this potentially be dangerous for feeding?