[Celeste P]

My puppy will eat Chicken although it’s not his favourite meat and he’d love for anything else he’d rather boiled broccoli than chicken.

Try to give some chicken to him raw? It’s healthy and including the bones (Dogs can digest raw bones but the moment they’re cooked they become hard and dogs stomachs can’t digest the bone once cooked must be raw.)
And raw chicken is good for them their body can withstand salmonella they’re made for that. It’s in their blood.

So try raw chicken, or ground beef, my dog is pickey with his meat unlike most dogs, he loves pork though haha poor piggys.

Try different fruits and vegetables banker dogs love apples mine loves lettuce, boiled broccoli, he doesn’t like peanut butter like most dogs.
Just like a baby learning to eat solids you literally have to try everything that they can et and see what he likes of you wanna give him something to try and you don’t know if it’s good for him or not google it and based on the pros and cons of what you read you really just gotta try.