Hello Friends! This is my first post ever and I need some suggestions and opinions pleaseeeee!

I have an adorable baby boy who is a little over 6 months. He is very smart and a lover! Ive read sooooo many threads and post about some of these questions but maybe thought i could get straight answers a little more clear here! So here I go, my first problem is he is sooooo picky with food..we have been trying so many types, what is a good suggestion. Also he is pretty skinny. Colt doesnt eat much either so im a little worried!

Two, his eyes are so runny..not stained just water a lot! Allergies because we live in Nevada maybe?? So frustrating. Last is his chewing! I know he is a puppy and teething but will it stop when he has his adult teeth? We always tell him no, tap his nose, say ouch..tried it all! ALL ADVICE IS SOOOOOOOOO APPRECIATED!!!