Only thought on the dog is: live with it or get a new dog. I have a basenji-pit mix, 7 y.o. that we've had for four years and no matter what we've done he has that stubborn chase mentality, it's in his breed and will always be there. Either learn to live with it, adjust any way possible (fewer walks, and find a way for the dog to get her exercise without the walks?), or get rid of her. Do you enjoy the walks, or is it just to get her exercise/relieve herself? If not, maybe hire a dog walker who can handle her weight.

On the husband: live with it or get a new husband :) Sorry.

My only thought is, like the dog, he is who he is, after 25 years of marriage I'm sure you know that as well as anyone. Have the two of you ever had (or talked about) marriage counseling? It's less and less a stigmatic thing these days, lots of couples are even doing it early in marriage to prevent any issues creeping in. Sometimes talking things through with a professional mediator/therapist can be a good thing. I'm recently married and the pastor from my wife's church had us sit with him for pre-marriage counseling, he used typical marriage counseling materials to see where trouble spots might be and get us talking about them. It was really good and I think we learned a lot from it, and we're planning on making it a semi-regular thing to make sure we're both getting things in the open and not repressing any hard feelings.