There could be heaps of reasons he is waking. Cooper is just 8 months and his sleep is all over the place at the moment! He normally sleeps from 6.30 pm to 5.00 am but he's had weeks of waking at 10.00 pm. Then a week where he woke at 1.00 am. Then the last few nights he's been almost making it to 5.00 am... either 3.30 am or 4.00 am. He's definitely going through something at the moment because he's off his solids too.

So perhaps your Cooper is just going through a developmental stage, teething or a growth spurt?