Kristy, definately research bloat and know the signs also canine cpr. Bloat and gastric tortion are issues that can effect your mastiff but with proper care & good dieting it isn't likely but having the knowledge just in case is always a good thing. Also, discuss bloat with your vet, ask about their procedures and have a reaction plan. Your vet can tell you what you need to know. CPR is easy, I never thought I would ever use it, but did one day on a puppy that almost drowned. It felt pretty good to save that little life! I posted a cpr chart on a thread on the forum here somewhere, I'll look for it and try to repost. Also, it is a good idea to keep a little first aid kit for cuts, splinters, etc. with sunscreen, antibiotic ointment, peroxide, bandages, benedryl, hydrocortisone cream, peptobismal tablets, tweezers and some wipes. I keep one with us when we go places. Once Buddy on a walk in the park got little pieces of glass stuck in his left rear paw, that kit was pretty hand to have! I've used it for bug bites, and all sorts of little accidents.