bad frozen milk??

ashbash4 • Mommy to Carl and Cora; LOVE THE LIFE YOU LIVE; fuck what anyone says
My son is almost 10 months and he's not liking the bottle at all. I went back to work 3 weeks ago and my husband has been trying to give him the milk I froze, he absolutely refuses it. So a few days ago I opened up the bag and smelled it and it has a funky smell to it. I don't know if it's a normal smell or not. But since my baby refuses it I'm thinking it tastes like shit lol 
I do pump and give him the milk fresh and he still doesn't like the bottle but after about 30 minutes if he's starving he will take it. Only if it's fresh milk. Had anyone else had his probelm?