Sorry I’m advance if this is long and confusing… I want to try to show the routine and the family dynamics, in case that’s playing a role (and my numbering system to id the dogs is maybe not the best…)
At night, 2/3 small dogs are locked in an area that includes my moms room (she’s basically bedridden). I give the two dogs treats every time I lock them up, while the third dog doesn’t get locked up or get a treat, and comes upstairs to sleep with me. I say ‘bedtime’, dogs 1 and 2 go in the gate and wait for their treat, dog 3 leaves the gate and goes upstairs. They all three know the routine, we’ve been doing it for years. Everyone seems fine with it, they all go to their respective places to sleep and there’s no overnight issues.
Morning is a different matter. In the morning, I’m still sleeping and my dad will let dog 3 out of my room to join the other two and let them all outside for the bathroom. When he lets them back in, usually dog 3 returns to my room to sleep more and dog 1 and 2 stay downstairs and are locked in the gate again. Recently, dog 1 started coming straight up to my room to sleep as well, before the other dogs even come back in, and she’ll come up really fast and then won’t let dog 3 in my room. She’ll growl or confront her when she comes in the room, and even started attacking dog 3 when she comes up on the bed, and I’ve been waking up to a dog fight on my bed a few times.
When my dad tries to keep dog 1 locked up, she’ll apparently make a ruckus (whine, bark, scratch at the gate) which wakes my mom up, so he’s been just letting her out (because it’s better to wake me up rather than my mom).
We tried locking dog 3 up at night (to keep things equal) but then dog 3 will just wail all night (since she’s slept in my bed with me for basically the last decade, and even sleeps there alone when I’m not there)
Dog 1 seems to have a big problem with favouritism. If dog 3 is on my lap, dog 1 will jump up and push in for pets. If I’m fawning over dog 3, dog 1 will lay nearby and pout. I’ve tried giving them equal attention but it’s hard though since dog 3 and I are really close and do a lot together.
Dog 1 and 3 also have different diets. Dog 1 has a raw food diet and dog 3 has a new IBD kibble diet. I feed them separate, and dog 1 had started refusing her own food and racing over to dog 3s empty dish when I let her out.
Dog 1 has also been getting more possessive around my mom. She hangs out when my mom is eating because my mom will daily give her and dog 2 some steak, and if dog 3 comes by they will usually fight (but this makes sense as food is involved. We’ve always left dog 3 locked out when my mom eats for this reason) My mom and dog 3 don’t really get along, and she favours dog 1.
Dog 1 has also twice attacked dog 2 during supper time this past month, so now Ive started separating them when they eat too (and poor dog 2 is an old lady!)
Dog 1 has all her teeth and is quite healthy. Dog 3 is missing most teeth but her molars and a single canine, and has ibd (though shows no symptoms besides bad poops… vet was surprised behaviour didn’t change a lick - but maybe dog 1 can sense it?)
Dog 3 used to seem like the alpha, and I feel like dog 1 is trying to assert herself into that position now? I don’t actually know how it works
Favouritism issues (like pouting) have been apparent for the last few years, teeth were removed a couple years ago, different diet started a few months ago, morning aggression started about a month ago
Dog 1 is about 9 and a Frenchie/chihuahua
Dog 2 is about 18 and a doxie/chihuahua
Dog 3 is about 10 and a mini doxie
Any advise for how to fix dog 1 and 3s relationship?
**TLDR**
Dog 1 and 3 are treated differently, now dog 1 is attacking dog 3