Sleep training

We are on day three of sleep training and already messed up. We are trying to do the Ferber method and I feel like my husband and I just aren’t on the same page. She slept from 6:10-12 am and then he gave her a bottle. Which is fine. The doctor said to wean her off that one. Now she woke up again at 4:40 I let her cry for 20 min and be told me to give her a bottle so I did. I don’t think she needs the bottle. She’s already eating solids and is almost 17lbs. She wants it for comfort. I keep telling him the more we keep caving the longer this is going to take. Does anyone have a six month old who still likes to eat during the night? I almost feel like I’m gonna have to do this when he’s out of town or something.