The fighting won't end until there is one clear pack leader and that has to be you - which is a lot easier said than done I know especially as you are pregnant.

I don't know if anyone here can give you tips on how to show them you are the boss. Archie is forever taking toys off Tobey so I just take the toy away from him so he knows I'm in charge but both my boys are smaller dogs so I wouldn't try anything like that with your girls.

I hope you can get this resolved soon - it can be much fun for either you or the dogs being constantly on edge, which the dogs will sense so are more likely to attack.......