Getting rid of bugs on feathers is not hard. Any new hackles or fur should be isolated from your other items until you know they are clean. Bringing a new neck into your warm tying room will accelerate the hatching of eggs. Eggs is usually where you get into trouble. A good washing in a dish detergent will get rid of eggs and bugs. Let the feathers soak for at least thirty minutes. Just make sure you dry them thoroughly before you store them. Any feathers that get bent or out of shape can be restored by steaming them. A good way to isolate new feathers are in wide mouthed Mason jars or Poly bags. Then when you know they are clean you can combine with your other tying materials.
So here is a good procedure to follow.
1. Isolate new feathers in jar or poly bag in a warm room. If no bugs in a week or two you are good to go.
2. Feathers with bugs wash in detergent soaking for at least thirty minutes.
3. Completely dry the feathers and store in jar or poly bag. Steam any feathers that are not laying flat after the washing.
Hides are harder to deal with but boiling in water for a few minutes will get rid of the bugs. you then need to throughly dry the hide before storage.