It sounds like your message got cut off. You wrote:
“Pulled my beef roast out of the slow cooker and saw these …”
Could you tell me what you saw? For example:
- Small white worms or maggots
- Stringy white fibers
- Foamy or fatty pieces
- Bone fragments
- Something moving
If possible, also tell me:
- What the pieces looked like (color, size, shape)
- Whether they were moving
- Whether the meat was fresh or frozen before cooking
You can also upload a photo if you have one. That will help identify exactly what it might be and whether the food is safe to eat.