Poor you, what a nightmare! I can totally sympathise with the dog issue. I actually have a dog, it is a tiny maltese/westie cross who is a soft as you like, and great with children, but we have a friend who is unhappy around dogs, so I always put her in the office when she comes round out of respect - it is our choice to have an animal, but we don't foist her on people who don't like it.
I also sympathise with the in laws. I actually have moved to germany, so my parents are about 5 hours via flights away from me, so I really have to get on with them. They are in fact terribly kind, but a bit too over involved. We had situations like MIL expecting she is still no 1, sitting in the front of the car if we are together and me shoved in the back, or my HB to open doors for her first etc. Her opinion over something to do with our flat, how we live etc was always listened to with great reverence, often over mine, even when I knew her to be wrong - for us. It sounds trivial, but it was all the time, and bloody annoying.
In the end I had a huge, huge bust up with HB about it, and said enough. WE are the team here, we are the unit, and we come first. I will always put you ahead over my family now, and you must do the same, you must back me up with them even if you don't fully agree sometimes, we must present a united front, no chinks in the armour. We are also 'adults' now and must be seen as such. . I don't know if this approach would work with your hubby, but I kind of went in and got the right outcome from him by saying 'look, Now we are married (you could say 'having the baby etc') I will always put you first over my parents, family, and stand up to them for you - we are the family unit, of our own now' etc and then you can say he should do the same in return with his parents. I bet you anything he says they are fine, and you are over reacting as actually he is desperate to stop an argument weirdly, and try and keep the peace. My HB behaved like this until I said we both had to strap on a pair.
Also your HB really ought to put his foot down over the dog stuff too. I tend to get my way if I present HB with fact - show him links to research on the topic such as the link below which shows the pros and cons - show your in laws too. Basically, dobermans should be brought up as a puppy alongside small children, otherwise they will seen children as a threat, they will be jealous of then, and prone to snap, snarl and in worst cases attack. This is a fact, any doberman breeder would telly you that, or any dog expert or decent trainer. People can see it's not just you being 'difficult' when faced with a reasoned argument. People can be very silly with their animals as theirs is 'different' nonsense... www.terrificpets.com/articles/10244365.asp
www.familydobes.com/dobermans_&_kids.htm
Best of luck and sorry for my essay!!