Thank you for answering my questions.
I would be most concerned about a wild deer parasite called the deer meningeal worm. Wild deer are the carrier, and goats often end up becoming sick, with symptoms you describe, this time of year. The intermediate host for this parasite is snails and slugs, so even if the deer cannot get into your goat's pasture, if they are near the snails can become infected and move into the pasture, where your goats eat them.
To diagnose this condition, definitively, an examination of the fluid around the spine is evaluated. However, the treatment is supportive and involves deworming, which you mentioned your vet has already done, and anti inflammatory drugs. The deworming drugs effective are levamizole (7 mg/kg by mouth, once) or Thiabendazole (250 to 440 mg/kg of body weight two days in a row). It is unknown if Ivermectin is really successful against this parasite. Anti inflammatory drugs such as aspirin (100 mg/kg two to three times a day) OR banamine (flunixin meglumine) 1 to 2.2 mg/kg twice a day can be given to help alleviate the neurological side effects you are seeing (inability to stand, weakness, head tilt, ect.)
It is important NOT to give both banamine and aspirin at the same time because of the risk of stomach ulcers and other side-effects of NSAIDs. You should consult your veterinarian for the drug they feel is most appropriate for your goat before giving them either drug. I would also recommend confirming which deworming agent your Dr. gave as you may need to give a different deworming medication to help your goat get better.
The gurgling you hear in the stomach is probably related to the rumination, but I don't believe it is "normal". Try to increase the roughage/fiber you are feeding her to help with this.
Also, try and get her up, even if she cannot stand, for at least 30 to 40 minutes twice a day and move her legs (like a physical therapist would for you). Use a straw or hay bale, or other such supportive, padded device under her while you do this.
Please let me know if I can be of further assistance with your goat.
I apologize for hitting "answer" on the previous information request. I have asked to moderator to correct my error.