Red and black growth on eye
My dog is 15yrs old, part beagle part German shepherd. Yesterday I noticed a growth or something in his right eye, it now covers about half his eye. He seems lethargic and disoriented. I tried to give him some peanut butter and when he tried to lick it with his head looking up he was unable, once I lowered my hand to where he would reach it looking down he was able to lick. He is also taking small sips of water whereas he usually drinks must faster.
I would like to take him to a vet but he is terrified of them. Last time they had to give him a sedative because they were afraid he was going to give himself a heart attack.
I have attached a picture of his eye, any help would be GREATLY appreciated.