If he relies on his great wealth, it will be taken from him and left to someone else. pg 351
Daily Halacha 7th Shevat
The Talmud determined that eating meat and fish together is a sakanah injurious to one's health. This is a universal custom and should be strictly adhered to. Since it is prohibited to mix meat and fish in any way, one should also not bake a pot of fish and a pot of meat together in the same oven unless at least one of the posts is tightly covered. If they were both uncovered, a Rav should be asked.
Bread that was backed in an oven with an uncovered pot of fish may be eaten with meat, and vice versa. But any food that was baked, cooked, or roasted in a pot together with fish or meat may not be eaten together with the other.