How long ago were the shots? You mentioned a month.. how long before the steroids, antibiotics etc are considered gone?
When trying to lift her, does she USE her back legs to try to struggle free? if she has the ability to use them when in a panic situation, it means she is not paralyzed, just HURT, and time will get her back on her feet.. If the rear legs remain limp whens she struggles, there is no hope... The hard part is balancing your time and effort with the return... Cattle prices are UP right now, but you can only go so far.
Scott