My sweet greater Swiss mountain dog was neutered and had a gastropexy 2 weeks ago, sutures removed last Friday and today his incision started draining. I took him to the vet and they said it could be a seroma or infection and started him on clavamox and took a culture to further look into it. I was only told to put him in a t shirt and leave it be but it is draining a lot. I feel better if I were to clean it with saline and dress it, changing it whenever the bandage is saturated. What is the best way to go about this and treat this? I feel leaving it open May put it at a greater risk for infection. He is otherwise acting normal with no behavioral changes. Would love any feedback I can get! Most recent picture is attached.