She might be one that just fills at the last moment.
I know ND tend to go closer to day 145, but gestation is still 145-155 for the species as a whole. It’s not going to be totally off the wall and super worrisome if she goes on 155 especially if she only has a single in there, which singles gestation tend (not a rule!) is longer then multiples.
Does she share a fence with a buck? I know it seems like one of those things that might be possible but probably won’t happen but breeding threw a fence is a very very real thing so if she does share a fence line she might’ve due later
I took her to the vet because I was worried and they ultrasounded her. She has 1-2 babies in there. We for sure saw 1 its heartbeat and everything. Pretty sure there are two but it’s hard to tell. The vet thinks she must have gotten bred at a later date. So still waiting and watching her.