It is very hard to answer these questions because you can be sure there are exceptions to the rule. Pitbulls are not good gaurd dogs, but every once in a while, one is. They are largely happier indoors, but soem like it outside. Most enjoy chewing and digging, but at our house, they are resricted to toys and that seems to work. This doesn't mean that nothing has been destroyed. It's just quite rare.
I guess my point is that you seem to have a list a things that are very important to you. THat is great. Now you can start searching some rescues. The best thing about rescues is the dogs are in foster homes and can answer these questions about every dog.
Sounds like you want a dog that is 1-2 years old, sex doesn't matter, has some training or will train easily, doesn't destroy and dig, doesn't have major seperation anxiety, is very active and handles different weather well, is potty trained, and is not a picky eater. Cool! I'm not being sarcastic. It is much easier to help you find a dog when you know what you want. There are many rescues who can help you find the perfect dog!!!!!!!
My adult pit, who's about 45 pounds, eats 2 1/2 cups of high quality food every day. My dog, who loves people, would likely not like it if a door was kicked in, but someone walking in would just find someone to play with. Oh well.
As to getting two dogs, well... I have two. In some ways it's great, but they are NOT allowed to keep each other company when I'm not home. They must be seperated when not supervised. They are best buds, but you never know when one is grouchy and the other won't quit trying to get them to play. It can turn ugly fast. Same goes with feeding time. We are not talking about a torn up ear, so fight prevention is key. You can never be sure that they will do well you are not there. I was a little bummed, because now that we have two, they can't play with squeaky toys, which they both love. My female made it very clear she would kill my pup over it. I took it away immediately. Now she can't have a toy she loves very much. Unless he's not home, she will never see it again.
I love them both, but it has has some interesteing effects. First, my adult that was very tightly bonded with my husband and me, is now less attatched to us and more to the pup (they really are best buds). Second, we used to be able to throw the dog in the truck and go, but they can't both be left alone in the car, so now we can't take them unless they can get out with us everywhere on our list. Third, dealing with feeding time is a lot more work. I have not had any issues, but I'm sure it's because we have VERY strict rules about who eats where and what and in what order. Fourth, I ahve had to learn to read them both, because soemtimes, for no apparent reason, they don't wanna play and that has to be enforced. Fifth, someone has to be crated at night and when we're gone. For us it's easy, the pup is a pain so he goes in the crate. As they get older, I think rooms on the opposite end of the house will work. Neither likes to be confined, so I'm gonna have to figure something out to make them both happy.
I am so excited that you are looking for a pitbull to keep you warm at night and play with you and hike and all that cool stuff. Sounds like you are on the road to being a very responsible owner with all of the informed questions and research you are doing. Thank you for being so diligent about understanding what you are getting into! These are great dogs, but very high energy and sometimes (pretty common) prone to dog aggression. If you are prepared for this, you will do great.
If the list above sounds right, I will join you in the search for the perfect dog. If there's anything that's wrong or you want to add, let us know so we can helpyou find the perfect match. The more picky you are now, the happier you will be later! You are in a great position to find the perfect dog for you!
I didn't mean for this to be so long. Oops. I'm just so glad that you are doing your research I want to make sure you get the most info you can.
Welcome to the board!