Sounds similar to my twin girls who are now 2.5 years. They did not drop the middle of the night feeding until just after 4 mos. Here are a list of things that might help you:
*My night nurse had us put them to sleep in their car seats bc the inclined position helped avoid acid reflux / digestive issues. This really helped to prevent them from waking up after eating. Any seat in a reclined position can work.
*Right before 4 mos, I added cereal mixed w/a little apple juice and formula (or breast milk) to get a little extra calories into them. 1 - 2x / day.
*I wrote down the # of oz / feeding and the times of each feeding every day 24 hrs /day so I knew exactly how much they were eating ... this helped me as we dropped the night feeding bc I *knew* they were not undernourished if they fussed / cried.
*So how did we lose the night feeding? One night my fussy one woke first just 1.5 hours after a 6 oz dream feeding session; she woke the 2nd one who also began to fuss. I moved the louder one into a separate room while I went to get their bottles. When I came back, the 2nd one had dozed back to sleep and the fussy one was just lying on the bed, not crying, staring at the light in the ceiling. This is when I realized she was waking both of them by habit (and the less fussy one had not been finishing this feeding for a while ... often just drinking an oz or 2). That night, I put the fussy one in a pack n play in a separate room, did not feed them at that time but waited ... figuring I would need to feed them within an hour. Well, the fussy one fussed 2 - 3 times for 5 - 20 minutes at a stretch over the next 4 hours. Just as I was ready to go and get her, she'd stop. Finally, at 5:30 or so, I gave them both a normal feeding. After that night, we never went back to the middle of the night feeding and life improved dramatically. We'd feed btwn 10 - 11 and they'd mostly sleep til btwn 5 - 6. I'd say it took 2 more nights max of a few fussy bouts of about 15 minutes before she'd go back to sleep.
Notes:
*As my friend who had older twins said "Once you go down a path, *never* go backward." ... Pacifiers, blankets, feedings, bottles, etc.
*It generally does take about 3 days (or nights) to help them learn the new procedure or schedule -- but they do get it!
*Tracking how much they eat will help you feel better if they do cry at night because you will *know* they can't really be hungry.
*When I decided to allow my fussy one to cry for up to 20 minutes, I did it after talking w/my husband and he reminded me that when we are in the car and driving to my parents house which is an hour away, one of the girls will often cry at least 20 mins but we can't stop bc we are going over a bridge. I figure that if I am ok with it in the car, then I can implement that at night without feeling like a horrible mother.
Good luck! The first year with twins is so hard, but clearly rewarding. The 2nd year and beyond is just great! Adorable children with built-in playmates!
Feel free to message me if you think I can help you answer any questions. Happy to share experiences.