Yes, certainly sounds like a low gut hit. When a deer is gut hit, the food in it's digestive track mixes withthe blood of the animaland it casues a serious bloodinfection that eventually kills the deer. It's a horrible death for the animal. He'll die but it alsodepends on how much much food matter is spilled. For a low hit like it soundsyou made where not much blood circulation happens, it can take up to three days in some cases for the deer to succumb to the wound and eventually die.

If you hit low guts, it sounds like 1. you misjudged the distance and 2. hewas moving or he moved forward after yourshot. 35 yards is still a long shot at a deer. I shoot at almost 330 fps and Idon't take that long of a shot unless he's wide open and standing still and at ease.35 yards can be a real low percentage shot unless you've practiced at that range extensivly andhave ranged the shot andknow the shot distance before you take it. Guys have torespect the animal they are hunting andhave discipline not to take a shot that pushes the limits ofthe individuals skill. Too many guys are doing it and it gives the sport a bad name.We owe it to the animal we're hunting to dispatch itas quickly as possible and not take low percentage shots unlessthe shooters skill accomodates the shot.

I'd definately take your bow with you,you might find him in a bed still alive and you might be able to get another one in him.