I have this bull frog that is wild and lives in my goldfish pond. I bring in the goldfish every year. Also Every winter I bring in the bull frog and raise him because he tries to hibernate in the pond but its way too shallow and it will kill him. (I had many Bull Frogs that died in their every year because it was too shallow) Than every spring I release him back into the wild and I've been doing this for years. He keeps coming back to my pond and I don't want him to die and also I hate brining him in because he a wild frog and loves out doors. I really don't want him to hibernate in my goldfish pond its too shallow and he will freeze to death. I just put him out doors today in my yard and he found his way back to my goldfish pond. What should I do?