Weight gain

PhillyGal34

I just took my son for a shot and they weighed him. In 4 weeks he gained less than a pound. He used to gain much faster. I'm concerned that his weigh gain has slowed so much. He eats about 14 to 18 ounces in bottles when I'm gone during the day for about 10 hours and then nurses once when I get home [if he didn't have his last bottle] and then once before bedtime and once at around 5:30 am and once before I leave for work. He's eating plenty!! Should I be concerned? His 6 month checkup is tomorrow and I'm afraid he will just say "supplement" as an answer but I don't want to if I don't have to. We start solids on Saturday.

Thanks.

Eta in those 4 weeks he also got 2 teeth if that matters so there was some teething time. The weight gain has slowed the past month only.