Hi no give only breastmilk exclusively till age of six months after that u can give formula milk and semisolid food both along with breastmilk

Yes you can

Hi it can be, give clean cold cotton cloth refrigerated one for chewing to soothe the baby's gums and pain too and prevent your baby from taking everything in the mouth to prevent infections and diarrhoea during teething

Hi baby needs iron syrup, get it once examined by paediatrician to rule out any other cause

Hi yes stop bottle feed as its most common source of infection and diarrhoea in babies, and give ORS in water frequently in sips in a day and lots of fluids in the diet and simple homemade food like like khichdi daliya etc

What type of food you are feeding?

Try different bottle or try going a nipple size up.till the baby accepts try dreamfeeding.

You need to sterilize bottles after every feed ...
And to sterilize take one vessel filled with water,and put bottles,nipples to that let the water gets heated...and then you clean with brush ....

Hi give only breastmilk till age of six months exclusively after that u can can give formula milk and semisolid food both along with breastmilk

What's your baby's age??

Upto six months breastfeeding only recommended for babies....
After that only you can start giving semi-solid foods along with bm or fm....

And no cow milk till one year ...
It is hard to digest for babies....

Consult once with your Paediatrician regarding formula milk,they will suggest you the best one ....