Well, knowing will either stress you out, or let you relax. I like to know, but that's me. Yes, that's a standard nothing to see there udder. If she is bred I would guess she has 2 months or more to go. Ultrasound seems to be the best way to go for minis, if your vet will do it, and many will not. They can lightly sedate her for it so it's less stressful. Other than that my favorite is to take an udder pic once a week. If you notice a change one week it may not mean anything but if you can look and see it's bigger and bigger 2 weeks in a row you have something brewing. Of course that only works for the last 2 months or so, It won't tell you today if she is going to foal in march.