Can any dog learn?

Anonymous
I have a pomchi. And I didn’t think smart and just bought her last year and I’ve always wanted a very well trained dog. Like stays on command sits on command. Really good recall so she can be off the leash etc. but I’m worried her breed type just is incapable of learning it as I know more smarter breeds tend to do this easily whereas other breeds don’t. And she has been a slow learner nearly a year of having her and she’s barely just potty trained it took a lot of time and effort and she still does it in certain houses but not the one we currently live in only when we visit my mums house (where she grew up for 5-6 months and always went toilet inside anywhere) sometimes she’s sneaky and if someone walks in the house I call her and she just runs to them. I know she’s excited but she knows I’m calling and runs faster and there’s a dog here that has tried attacking her once so it’s essential she answers to me or I’m constantly chasing her is it possible for her to learn commands and act fast to them?
Can any dog learn?
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