Help Lucas come home

Hi family and friends, our 7 year old family companion Lucas is not doing well. He has been sick for the past month ,we have visited 3 vets in past 3 weeks and none of them have led us to the right direction on what is wrong with Lucas. They have only had him on meds to control his on going vomiting. He has lost a significant amount of weight too. He was rushed to Oradell Animal Hospital on 12/23/2021 because he was extremely dehydrated and very lethargic. We would appreciate any help that will go towards Lucas’s treatment to bring him back home. We will keep everyone updated. Thank you.