Is my child getting enough protein?

I am worried about my son's eating habits. He will not eat much red meat and he will eat no beans or peanut butter. What other ways can I get some protien  into his die. He is a very picky eater. Can I give him some sort of supplement?

[Renee Radenberg]

Protein comes from animal and plant. From animal sources it comes from all meats, chicken, fish, beef, pork, etc.; and dairy products such as milk, yogurt, cheeses, pudding, and ice cream. From the plant world there are complete proteins such as soy products:  tofu, soy milk, soy yogurt, soy pudding, and soy ice cream. Incomplete proteins you need to combine foods such as beans and rice, pasta with vegetables, peanut butter and bread, nuts in salad, and beans with pasta. You did not state his age so I am not able to determine if his weight and height is normal for his age. If would state his age, then I can determine if he needs a supplement or not. Thank you.