I've only had him a few weeks and I've been trying to do everything I was told. But today he hasn't been acting normal. He wanted to sleep all day and did not play as normal during lunch time. He was eating normal this morning but now he's only eating half of what he would be eating. Then I noticed some clicking sounds when he's breathing and looks to be breathing hard. He eats with a 1cc syringe and as far as I've noticed has not aspirated but after reading so much about all the problems I believe he has pneumonia. What antibiotics can I give him and how much? He is underweight at only 109.2 grams. His fv and blocks should be here tomorrow and he's been doing great up until today.