Recently, my first african dwarf frog died. I soon got a new one. I noticed with the other ADF that he was very skinny. The new one is very plump. I believe he died of starvation. I think this was because I fed him with all the other fish in the tank which included goldfish which would eat his food. I had been giving him pellets. Should I feed the new frog in a different place? Like in w bowl or something? I don't want the same thing to happen. Thanks!