Maria -
"Some of your points do make sense to me, & I definitely will be offering non-mushy foods to my boy when he's over 6 months."
Ideally you shouldn't offer any solid food to your baby until they reach 26 weeks because even though some babies digestive systems will be ready before this you can't actually tell so it is best to wait until 26 weeks. The idea with BLW is that the babies that are ready before 26 weeks will be able to self feed. If say a 23 week old baby can sit up, pick food up, put it in their mouth, chew an swallow it then their insides are ready for food. By feeding them yourself they can't tell you if they are ready or not.
"The other thing I worry about in that in the way of eating you describe- i.e. no mush whatsoever- there must surely be some problems with getting enough calories in! So in that case I would assume milk would still be the main nutrition given for much longer. So I'm wondering- what could be the problem with a combination of mushes (so that more calories can be taken in through food, and a wider range of nutrients than just milk) and 'proper food'? "
Until they are 12 months milk is way more important than solid food. Milk has much more calories than any "mush" you might feed them. That is why it doesn't matter if they take a few months to really get going with BLW cos before 12 months food is just for exploring, learning, feeling, touching, tasting. It's not really meant as much nutrition at this stage.
"The other thing is, I've heard from many many people that when babies are properly weaned, i.e. are taking solids on a regular basis, that helps with babies sleeping better... and also reduces night wakings. Speaking as a horribly sleep deprived parent of a 4 month old, I personally am waiting impatiently to introduce some basic solids, e.g. banana or baby rice. In fact, I'm thinking of starting those very mild foods around the 5 month mark, as surely there's no risk of allergy just with banana, baby rice & such. Not sure if the solids=sleep association is actually true, but one has to have hope!!"
Babies can react to almost anything even baby rice and banana. My MW and HV told us just to avoid nuts, fish (both normal fish and shellfish), meat, gluten, dairy, citrus and honey so I was glad DS was under a paed nutritionist cos they told me a very different story.
DS was losing a lot of weight so a paed nutritionist advised early weaning. He said to steer clear of anything except for fruit and veg. this is because things like nuts, fish (both normal fish and shellfish), meat, gluten, rice and dairy are frequently things people are intolerant to. even with just sticking to fruit and veg weaning before 26 weeks is still quite difficult because fruits and veg that you should avoid before 26 weeks are apples, pears, plums, cherries, nectarines, peaches, mangoes, melons, bananas, kiwis, raspberries, grapes, strawberries, citrus fruits, tomatoes, mushrooms, peas and peppers because they are common allergens aswell. the most common fruits to be allergic to usually have seeds or stones and the vegetables are usually beans or legumes.
Luckily DS then started to put weight on so we were told it was now best to wait until 26 weeks. As it was we left it until 8 months cos he just wasn't ready.
Also the sleeping through thing is a complete myth. If they are waking in the night due to hunger milk will be more more filling and calorific than the tiny amounts of solid food they might eat. Sometimes it does the exact opposite cos they find it hard to digest which can make them wake up.
Yes it does take them longer to fully grasp the idea of eating but that's the whole fun of it. They learn themselves how to eat the food by exploring it, like they do with everything - sitting, crawling, walking, jigsaws etc.
Also it helps them learn what they do and don't like. With BLW say they try some broccoli and don't like it. The next time you give them broccoli they think yuck it's that green tree thing i don't like that. With purees they see green slop. The next time you give them green slop (which in fact could be pea that they like) they refuse it because they think it is broccoli even though it might not be.