He does kind of have a bully-type head.  But I am really not good at guessing breeds.

For $70 you may be able to get a better answer than we can provide looking at a photo.  Mars Wisdom Panel is a DNA test that I have found to give very good information on my own dogs, and dogs I have fostered.  But, the more mix your dog is, the less satisfying the results of the test.  I get mine from Amazon – look for the 2.5 or 3.0 version, they are the newest and give more info than earlier versions.

I have tested 5 dogs so far, and have been delighted with the results. 

This is prey drive, and likely will not affect your son in the least.

HOWEVER.

If you haven’t yet, I would invest in a crate.  Train the dog to accept the crate, and crate the dog when you cannot supervise.  Had the dog been tested around cats prior to moving him to your home?  

So if the dog really doesn’t know any better, you cannot expect her to know how to behave.

YOU have to teach her. As I said, this means crating when you can’t supervise. When she isn’t crated, she should either be leashed to you or dragging a leash attached to her collar so you can INSTANTLY correct and redirect her, and don’t let her roam to another room unless she’s supervised by an adult. EVERYONE in the household has to be on board with this.

How is her general obedience? Does she respond instantly when you give her a command? If not, get in a class with a good, balanced trainer (ask your vet for a referral). This will help build a relationship between you and the dog, and the trainer may have more ideas for you.

Do the cats have a cat-safe room WITH a solid gate on the door? If not, set that up NOW. Make sure everything they need is in that room so you can shut the door if need be. I would also keep the kittens (and the queen, for now) in a dog crate when you can’t supervise them.

So any ideas what this could be?

Litterbox training a dog means they’ll use your house as a toilet.  Is there a reason you’re unwilling to walk the dog or let it out into a yard?

Bostons can be stubborn and very opinionated.  What is your experience with dog ownership?

I like pro plan, and eagle.  I feed Eagle.

Thanks a million, its just horrible seeing her hurting! As for the Meloxicam, I had seen a lot of stuff online saying that it’s been discovered that rats should be on much higher doses due to differences in metabolism and the fact that it’s not technically (off label) for rats. As a result vets tend to dose for equivalent body weight in dogs and they may not be getting enough. Is there possibly any accuracy to that? I have no medical background and so am absolutely not going to start adjusting prescriptions but if that’s the case I think a different painkiller would definitely be an idea. I hadn’t seen anything similar about the other medications so she may get more relief.

Obstruction?  Blockage?  Either way, treat this like an emergency.