There's technically no limit, but after a certain number your computer would surely lag too much to play or freeze altogether.
Chat with our AI personalities
For starters these minecraft dogs you are referring to are wolves and no they won't ignore you if you change your skin
There are no dogs in Minecraft, although there are wolves. Wolves are found usually in planes or forests. They spawn on grass and dirt.
Yes
You give them bones.
You can tame wild dogs by giving them bones.