8yo Bernese is dying from myelopathy. We're having trouble making him eat

Last week my dog started having difficulty walking and was panting heavily. He was gotten worse throughout the week. He is rapidly losing weight.

We've bought all different types of foods that you think a dog would like. He'll only eat very little. We've started feeding him Ensure through a syringe.

Do you guys have any other ideas of how to get him to eat?

Edit: We've had a little bit of success getting him to lick peanut butter off our our fingers, also eating a few bites of meat here and there. We've also started putting babyfood (pureed chicken, beef, turkey) into the syringe and putting that in his mouth. He is totally unable to eat hard food.