I have a 10 week old Muscovy duckling. He had a lot of growth problems but seems to have had a growth spurt just lately. He's almost fully feathered and has been going outside during the day and in the shed at night for the past couple of weeks. Last night it was quite mild so I decided to leave him in his duck house outside with lots of straw and a heat pad. I found him this morning all floppy and laying on his side. I brought him inside and gave him some sugar water and some food. He's eating fine but still really floppy and falling over to the side. I'm not sure what to do