Need help with Pygmy goat!

Hey! I am a new 'goat keeper' with 3 Pygmy goats aged 6 months old. I am having problems with my girl goat, her sysmptoms are:
- very scabby skin all over apart from belly
- she keeps dropping her back end as if unable to stand properly
- snotty nose and eyes (eyes keep scabbing completely shut)
- weight loss
- rapid/unusual breathing
- temperature of 41.5c
- tail dropped downwards

She seems to be eating & drinking fine and the 2 boy goats have nothing wrong with them.
I've had the vet out twice, and after injections and a look under the microscope at her scabs, has ruled out parasite infestation saying it showed nothing. Advised bathing her every 3 days with special shampoo, and "once the scabs go she will get better."
Doesn't explain the back end/weight loss/breathing etc?!?
Any help would be greatly appreciated I just want my baby to get better!!

I am based in Yorkshire in the UK.

 

Not particularly, and the boys are both castrated so don't really show interest. I have a crystalyx small holder block out for them.

 

She's been given antibiotics and pain relief and can't have any more for 10 days now according to vet. And not that much, a lot are restricted/have to bought and shipped in from the US.

 

Hi guys. Sorry for the lack of replies.

Just letting you know she took a turn for the worse last night, woke up to find her unable to even stand and bleating her head off in pain. Vet came out to see her and I was told there was nothing they could do to help her long term, only keep her alive for the next few days, so I had to have her put down this morning.

I am completely heartbroken and so very mad at the vet practice for how flippant they were towards her, as I know if they'd have taken her bloods when I first got them out they might have been able to save her, and i will never know what actually killed her.

Thank you all for your advice and help.