Cut/Scab that wont heal

First, a cavy savy vet would be in order.

What were the steriods for? Usually steriods inhibit healing.

Could you post a picture of the wound? How deep is it? Is it still infected or just not healing? How did she get cut?

Sorry about the delay in reply ive been on holiday for a week.
I dont know about the steroids, she was on them for 5days to keep infection out but they did nothing. It does look quite deep but it musnt be that bad as the vet said it should heal up. And no its not infected it just keeps bleeding and wont heal because she keeps nocking the scab off it but theres no way to stop her from doing this. It doesnt seem to be getting any worse, its just not getting better.
We have no idea how she got the scab it started out tiny then one day i was feeding my pigs and realised her fur was all red so picked her up and it had just suddenly got quite big. They both live in the hutch outside (its cleanered regularly by the way, even more than usual now with the cut as i dont want it getting infected) but ive checked it for sharp things pointing out which she could have scratched it on but theres nothing.

Do you think I should maybe try some sort of bandage :S
I will take a photo and post it here tomorrow or Monday

Just a thought - she might be scratching due to mites. An itch animal will scratch themselves raw. The steriods probably were for the itching as it will sometimes calm itching due to allergies. If it is mites the steroids would not help. If you have not already done so you might consider treating for mites, it couldn't hurt.