First off, the huge bulge on the left side is less indication of a calf... Lefty lunch, righty rugrat... in other words , the rumen is more obvious on the left side... and the calf is carried more on the right. Looking at you in the picture with the hay ring she bulges to the left. Looking at the picture where you are looking at her from the right side, she has a bulge on that side.
I am not being critical, but the cow is obese. She has too much fat around the hindquarters and tail head and is much more likely to have trouble calving due to the fat... and too much fat will also hamper their udder development and milk reproduction. The black white face is also extremely overweight... they look like finished animals ready for butcher.
The look of the "belly bulge" honestly has me concerned. When did you last see her urinate? Strong flow or little bit in spurts and dribbles? She might have a bladder blockage... which would make her look "bloated"... more common in steers or bulls but seen in fat animals.
There is also a condition called water belly, related to the blockage in the bladder... similar to having kidney stones but actually in the bladder... and there have been a few very unusual accounts of a calf getting a huge water belly while in utero, and the cow can't calve and the calf will weigh in the 200 lb neighborhood, always dead... and vets have to do a c-section to get it out or it can kill the cow. I would not even suggest that but the cow has way too much "low belly", and it concerns me.
Another thing, the way she was eating that ear of corn, she could have a partial blockage in her throat... they can easily get a chunk stuck when being fed like that... they could be able to bite it off in smaller pieces, not fed in the direction of going down the throat... they can choke or their throat can get partially blocked.
My suggestion is to get a vet to look at her... if she were mine, that is the first thing I would be doing.
If she got bred Jan 1st.. she would be due around Sept1-5...most beef cattle carry 270 +/- days... . so depending on when you butchered the bull, her due date should be soon if she is pregnant. Was she confirmed preg by a vet?
Cattle should not eat raw vegetables in the nightshade family... potatoes that are added to rations are supposed to be cooked... Soybeans can cause alot of problems if they are fed raw and not roasted. Corn is a grain, but if the corn is stunted, it can have a nitrate toxicity.... Not saying your area looks stressed or drought like conditions... just things to look at.
I would be calling a vet to look at her find out some status, she would be easy to palpate manually at this stage of the game.,... ultrasound not needed this far along. Sorry, but I am not at all comfortable with how she looks.
