Instead of going into it that you have to give up poultry, dairy and meat, think about all the things that you are letting yourself eat. Meat and dairy products tend to be more calorie dense than plant based ones. This means you get to eat more food and larger portions!
If you do ever miss meat or dairy, there are so many replacement options. I just had a grilled cheese for lunch! I eat ice cream all of the time, I can have vegan jelly beans and enjoy a delicious veggie burger and fries for dinner!
I get asked a lot, “how could you give up “blank”?”, but it’s not about that. I don’t crave a real burger or want feta cheese on my salad. Once I watched documentaries about some horrors of the meat and dairy industry, it was pretty hard for me to even think about wanting to eat them again. I’m thinking about the animals that don’t need to die for me to eat and how much I enjoy eating a plant based diet.