Yes, freezing pork bones can reduce the risk of trichinosis. Always buy from a reputable source. Freezing pork for 20 days at 5°F or 3 days at -4°F kills parasites and protects against trichinella roundworm infection. When giving your dog shoulder bones, make sure they’re appropriately sized and not a choking hazard. Cooked bone splinters can also injure internal organs if swallowed. Store-bought raw meaty bones should come from quality sources; factory-farmed animals’ muscles may contain more disease-causing pathogens than those raised organically or free range.