this week my 9 months old boy gets up in the middle of the night crying and won't take the bottle, why?

Babies go through phases and it could be a number of different things. Clearly he's not hungry since he's not taking his bottle. He could be going through a phase of separation anxiety if you're able to comfort him and get him back to sleep without the bottle. He could be getting sick and just doesn't show any symptoms yet. It absolutely could be teething - the teeth may not show up for several weeks even. Just hang in there, these phases are common.

Look up night terrors, but he may be too young for that yet. Our son had problems with those and he eventullay grew out of them.

I'm wondering if you are making a quiet rountine at bedtime (bath, reading, song). It allows babies to sleep soundly and slows their brains down before bedtime.

Try the bedtime routine if you don't already. It worked great for us.

Good luck.

He's teething, give him something frozen to chew on, they make teething rings you put in the freezer,I'm sure you already know that, but I threw it in there just in case

Hello i think ur problem is that your boy isnt getting enough attention. Has something gone wrong or have u not been playing with him or giving him something to do or interact with. Maybe hes scared and tromotized by somethign that happend that maybe u guys dont know about. Try to comfort him make him laugh and try to feed him again.

give him a glass, some people start drinking out of a glass at a VERy young age

sounds like an ear infection to me