My serama rooster has recently become super skinny (his breast bone is EXTREMELY prominent) although he has been eating the same amount as always. In addition, his comb and face was very pale although it has improved. He doesnt appear to be lethargic, though he has some more trouble flying than usual. (He likes to perch on the top of a box, but now he cant fly to the top). Does anyone have experience with this/know whats going on? He was my first rooster and I'll be heartbroken if he passes away. (That being said he is approaching the end of his natural lifespan, could it just be a sign hes getting old and is near passing?) Thank you for any help!!!