DD is breastfed but has a bottle before bed,
something she's had since she was 2 weeks old and we were told to start doing top-ups as she wasn't gaining weight and was a low birthweight baby. She is a good sleeper, usually waking once after about 5 hours. I'd been giving her the normal Aptamil 1 in her bottle.
When we were told to do top-ups I went out to buy formula but it was just at that time when all the shops were completely sold out of everything in early March, and the only thing left was the more expensive Profutura milk, so I bought that. I also managed to find the odd pre-mixed little bottles of the normal Aptamil in local newsagents etc, so bought those when I could, and have been using them ever since in her bedtime bottle (one little pre-mixed bottle does us two days), so I hadn't actually used the Profutura one yet.
Last night I gave her the Profutura type as I'd run out of the others. She's just slept for 9 hours.
Is it the formula? Or a coincidence? Do I need to pay more for sleep?