Concerned about friend's baby

Anon for obvious reasons.

So I have a friend who has a baby, he's about 8 months old. I love her so much, and she loves him so much, he's pretty much her whole life now, and I can see that she's trying to be the best mother she possibly can, spending most of her money on his needs, and taking him to baby groups/library groups etc.

However, there are a few behaviours that I've seen that have got me slightly concerned for his welfare. I'm training in childcare and know roughly the stages of development he should be at, (although I know every child is very different) I really don't want to go to social, as I don't believe it's that serious, however I'm wondering how to talk to her and if there's any advice I can reasonably give...I don't have a child so I know she's more likely to see it as an insult.

- He is stuck in his high chair, IMO far too much. Last time I was over there for example, I was there for 2 hours and he was in there the whole time, save for nappy changing. She says that she doesn't want him crawling in the living room as she doesn't have a carpet yet, just floorboards, but I gave her a huge rug not long ago for that purpose.
- She is saying that she will not get him vaccinated, (MMR etc) because of scare stories that she's seen on the internet. I know this is a contentious issue, but it's gotten me worried.
- She is feeding him far too much mushy food. He should be on soft solids by now, but all she gives him is very mushy baby food, as she says he doesn't like the solid stuff. Surely this will impact speech development?
- She smokes in the house. I'm a smoker myself, but I feel very uncomfortable smoking in any house, let alone with a baby in there. Again, this is a behaviour born out of naivety, as she does it in the kitchen whilst he is in the living room, but I don't know how to get the danger across without seeming stuck up.

I'd like to reiterate that the baby is very well loved, and not at risk of any physical harm or neglect. It's just that she comes from an extremely troubled background and there are some thing which do concern me, as she just doesn't have some of the knowledge, and the last thing I want to do is come across as insulting or patronising.
Has anyone been in a similar situation? Any advice would be appreciated.

Anon for obvious reasons.

So I have a friend who has a baby, he's about 8 months old. I love her so much, and she loves him so much, he's pretty much her whole life now, and I can see that she's trying to be the best mother she possibly can, spending most of her money on his needs, and taking him to baby groups/library groups etc.

However, there are a few behaviours that I've seen that have got me slightly concerned for his welfare. I'm training in childcare and know roughly the stages of development he should be at, (although I know every child is very different) I really don't want to go to social, as I don't believe it's that serious, however I'm wondering how to talk to her and if there's any advice I can reasonably give...I don't have a child so I know she's more likely to see it as an insult.

- He is stuck in his high chair, IMO far too much. Last time I was over there for example, I was there for 2 hours and he was in there the whole time, save for nappy changing. She says that she doesn't want him crawling in the living room as she doesn't have a carpet yet, just floorboards, but I gave her a huge rug not long ago for that purpose. How about a travel cot/playpen? If he's happy in the highchair and has toys and stimulation, as well as going to mother and baby groups where he can crawl around then it shouldn't e too much of a problem. How about in her room, is there a carpet and space for him to crawl about?
- She is saying that she will not get him vaccinated, (MMR etc) because of scare stories that she's seen on the internet. I know this is a contentious issue, but it's gotten me worried. That's a personal choice but how about having her read this article http://www.voicesforvaccines.org/growing-up-unvaccinated/.
- She is feeding him far too much mushy food. You are not an expert even if you're doing a childcare course. He should be on soft solids by now, but all she gives him is very mushy baby food, as she says he doesn't like the solid stuff. Surely this will impact speech development? If he won't eat solid food, it's better that he's eating than not eating food at all. You're coming at this from the perspective of the textbook, all babies are completely different, they haven't read the textbook and a mother has to do what's best for their baby not what is the best thing if you're baby follows the guidelines.
- She smokes in the house. I'm a smoker myself, but I feel very uncomfortable smoking in any house, let alone with a baby in there. Again, this is a behaviour born out of naivety, as she does it in the kitchen whilst he is in the living room, but I don't know how to get the danger across without seeming stuck up. This is the only thing that is concerning, has she thought about quitting? It's a hard subject to bring up.

I'd like to reiterate that the baby is very well loved, and not at risk of any physical harm or neglect. It's just that she comes from an extremely troubled background and there are some thing which do concern me, as she just doesn't have some of the knowledge, and the last thing I want to do is come across as insulting or patronising. To be honest I think you are, you're not qualified in anything and she knows her baby better than anyone, just because you've read something in a textbook doesn't mean you know more about what's best for her son than she does.
Has anyone been in a similar situation? Any advice would be appreciated.

Mushy food can impact a bit on speech development but it's not going to be serious unless he's still on it at 5 - and that's unlikely as it's just too much fuss.