[Glitch]

I have a super cute dog named Duchess. My grandpa has a dog named Lizzy.

Generally the two get along fine and play with their toys together and follow each other around the house . . . but, any time I take Duchess outside to go potty, Lizzy gets very upset about letting her back in the house.

She'll spend the whole time with her nose stuck in the crack of the door and I try to push her back so I can let Duchess in but sometimes I screw up and within seconds, they get into a fight.

Such as this morning. I had to go out with Duchess so I could dry her feet off which made it so I couldn't push Lizzy back from the door, seconds after I opened it they were locked onto each other pulling each other's whiskers out and what not.

I don't know how to get them to knock it off. Any advice on what I should do???