Last night I fed my crayfish shrimp for the first time. He is an adult crayfish, and maybe the shrimp was the size of his abdomen almost. Just regular shrimp for human consumption, I thawed it out and washed it. Today I found him floating on the water on his side. I touched him and he is alive, but I am very worried. Do you think I gave him too much shrimp? What can I do to make sure he survives? Thankyou...