Our 18 month old golden, Gray, will be getting neutered in the next few months, and I'm feeling a little nervous about it! Can you give me an idea of what to expect? How long will he be down and out for? When will the incision be healed enough that we will not have to be concerned about him pulling at the area and causing harm? Would you recommend a specific type of more comfortable "cone" that you have used with your dog rather than the standard plastic kind from the vet? Thanks so much!