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It can be quite difficult to diagnose without seeing pictures of the damage in question. My best guess given your description will be a fungal disease.

This article will help you: https://www.gardeningknowhow.com/edible/fruits/grapes/black-rot-grape-treatment.htm

This is blister mite damage. There is no real cause for concern, as they don't do much damage to your plants. They just look bad. There are a few ways to get rid of them, though they will usually resolve on their own.

This article will help: https://www.gardeningknowhow.com/edible/fruits/grapes/grape-leaf-blister-mites.htm

It really depends on the extent of the bark damage. If they are older vines and the goats pulled off some exfoliating outer bark, then there will probably be no negative effects. But if they stripped and chewed into the growing layer, especially on young plants, the conductive tissue could be damaged or exposed to sunburn and fungal infection, and uptake of water and nutrients compromised. The more of the circumference affected, the more damage and negative effects can be expected.

If you are not sure how deep or extensive the damage is, then it's wait and see. Wilting of foliage would be a first sign of extensive damage, followed by dieback of sections or the entire plant.

Keep the goats away from doing more damage of course. Water and fertilize to ensure best conditions for recovery.

This looks like Grape Black Rot. This can be quite difficult to control. This will have to be controlled by a fungicide that is specifically made for this application.

This article will give you more information on this subject, and how to control it: https://www.gardeningknowhow.com/edible/fruits/grapes/black-rot-grape-treatment.htm

There are quite a few reasons why this can happen. This article will go over the most common reasons, so that you can begin to narrow down the possibilities: https://www.gardeningknowhow.com/edible/fruits/grapes/how-to-get-grapes-on-vines.htm

This sounds like a Powdery Mildew issue.

https://www.gardeningknowhow.com/edible/fruits/grapes/powdery-mildew-on-grapes.htm