Fussy after bottles

So my almost 5 week old is EBF but I have been pumping and my husband gives her a bottle with fresh breast milk once a day. We've tried several bottles and she drinks the milk fine, she drank almost 4 ounces but is super fussy after and still wants to nurse. We started this in hopes that he could give her a bottle at night and I could get a little sleep. Any advice would be greatly appreciated!