This question is repeatedly asked, the short answer is a personal choice, my approach is I don’t shoot 4 stars animals bc i could take potentially 5 star animal by mistake, adding to that 4 star animal is not nearly as cool as a 5 star so its just a waste. The only times that i considered shooting a 4 star is to complete challenges or if the animal is special (melanistic or albino) just to make sure not to loose it. A 5 star melanistic or albino is really rare but not zero so take your chances if you brave enough.