Ok, I managed to get help holding him so I could really take a good look. It looks like there is not plug, but the sheath around the penis is colored black (could that possibly just be his normal sheath coloring?) Sorry for the poor input, but it never occurred to me that it might be any color other than pink, & I've never actually popped him out before to have a reference. the penis itself is a normal pink, so I think I might have been seeing a bit of the sheath the first time I flipped him over today & mistook that for purple in his opening. Are there rats with black sheaths around their penis?
Sorry, I know I must sound like a panicky mess, I'm just so afraid I'm going to overlook something here. I didn't see any plug to pop out, & the penis itself looked normal, just the sheath was colored dark gray. Also, he is retracting it perfectly fine, so perhaps he just has a different colored sheath?
Goodness, even when I think I have these animals down on such an intimate level, I find out there's still more I should be aware of. Seriously, I would feel so relieved if he just head a dark colored sheath right now, but boy am I going to feel dumb when the vet calls me back... :emb: