Thanks Penny and BAB for the replies.

Regarding the aircon, just after he was born we had aircon fitted to the bedroom of thier house so that he could sleep. So that is ok for sleep but he cant stay in that room all day.

I agree that the heat is putting him off his food and I thought it may take a few days to get used to the hot conditions, but its taking longer than I expected.

She is staying in Dapitan, which is, unfortunately hot there. She has tried different milk, including progress gold, but yet to find one that he likes. Dapitan is not that big so the choice is a little limited, but money is no problem when it comes to the health of my family.