Thank to everyone for the replies. I don’t mean to paint my sister as a bad person as she loves Chester dearly but her life with the dogs isn’t ideal right now. My brother in law is gone for half the year and my sister works 12-8 so it is just her with the dogs in an unideal situation. My sister wants to take Maggie out of the equation to ease Chester’s life but her husband isn’t willing to do anything about Maggie because she again is his baby. I am tempted to just take Chester until they figure out what to do with Maggie, but I feel badly for my sister because I know she will miss him a lot. Honestly the dynamics go a lot deeper than just the dogs, but I’ve kind of had the last straw with Aspen being bitten. They are on a vacation right now but we will see what they are going to do once they get home. My sister hasn’t even been able to respond to my text yet about Aspen being bitten but I think it will also be the last straw for her.
I don’t want Maggie to be put down because I do love her, but when you consider her quality of life (no walks, no dog play dates, etc.), she really isn’t “living”. The same goes for Chester; he can’t do anything because my sister feels guilty letting one dog go out but not the other. However I am worried she may attack even my sister one of these days.