I recently rescued an 8 year old German Shepherd / Chow Chow mix. She’s doing great except for not wanting to eat her dog food. I purchased the exact same food she was eating regularly at the shelter (chicken soup for the soul adult dry dog food). She begs for human food, though we aren’t giving her anymore - we did the first couple days because we really wanted her to eat but I now realize that was a mistake. This has been going on for about 5 days. She has eaten a few bites a couple times but not a significant volume. I have been offering her food 2-3 times per day for about 25 minutes after which I take away the food. Should I expect her hunger instincts to kick in eventually? The shelter thought she is likely testing us to see if she can get us to feed her tastier human food. Thanks.