Are you going by the bag? The "4+ cups" ? ... Because that sounds like a LOT to me.
He's eating quite a bit, still... 3 cups... It doesn't really sound like you should be too worried, because he IS eating it.
Also, at 10 months I think he should probably be on adult food. Puppy food is PACKED with calories.
How much does he weigh?
I didn't read the rice part... that MAY have made him a picky eater. People on the forum like the 15 minute rule... food down for 15 minutes and then if he doesn't eat it/done eating it, it's picked up and saved for later.
(ETA: Both of mine get 2 cups a day. Mojo is almost 7 months old and Maxie is 9 months old. Max is actually a little on the pudgy side, so we are very strict about hers.)
He's eating quite a bit, still... 3 cups... It doesn't really sound like you should be too worried, because he IS eating it.
Also, at 10 months I think he should probably be on adult food. Puppy food is PACKED with calories.
How much does he weigh?
I didn't read the rice part... that MAY have made him a picky eater. People on the forum like the 15 minute rule... food down for 15 minutes and then if he doesn't eat it/done eating it, it's picked up and saved for later.
(ETA: Both of mine get 2 cups a day. Mojo is almost 7 months old and Maxie is 9 months old. Max is actually a little on the pudgy side, so we are very strict about hers.)