It was very hard to understand what you're saying.

What I got from it was your husband doesn't want your dog Ozzy because he is large?

Did you guys do research/ look around before you got him?

Taking him to puppy classes/dog classes would be great.

Since you live in Florida, i'd hate to see you leaving him outside all day. I can barely take staying outside for a few minutes because it gets so hot.

May I suggest a doggie door? Therefore he could come in anytime he gets hot, sometimes you just have to teach him to use it though. You can buy ones that lock so that bugs don't get in, cold air from AC doesn't get out and so on.