Sounds like he can easily be on at least fuzzies: my corn who is 131 grams takes multiple fuzzies for me right now since I have a whole bag of them and want to use them up. She takes them easily and is growing like a weed (I use the 10-15% rule to feed).
And $1 for one pinkie? Sounds really overpriced for me. But then again I bought in bulk at 100 for $16: which is only .16 a piece from Rodent Pro.