I found a flying squirrel in my backyard last week , I was told he is around 4 weeks old but he is very small . He has his eyes open , he is eating fine , using the restroom . But I am worried . To my knowledge he has never aspirated , but after he eats he makes a faint almost clicking noise . It's only at most 5 minutes after he eats & then it goes away . I started feeding him last week every 2 hours but then i felt like that was too much bc he was refusing so I went to every 3 hours and he eats 1cc to 1.5cc every feeding . I always keep with heating pad on , small syringe with 1cc nipple for feedings , and always feed warm food . Should I be worried of pneumonia or is this normal ? Please help !