[Zoey Zendaya]

I went thru something like that too with my Zoey last summer and she almost died....it was that gastroenteritis . The ONLY food that brought her out of it was one the vet fed her while on IVS for 3 days....and that was Hills rx ID canned....I was floored ....she ate that after she came home ....preferred the crunch of kibble ...ate that for 3 months then just didn't want it anymore....but she was like a different dog! Your baby does not feel good and some dogs react different ...try this food, please. ....
I always give them a spoonful of canned pumkin too when they act like they don't wanna eat very well or their poop is really soft . That's an indicator they don't feel good for whatever reason...stress , heat, upset...
Don't wait too long to rush to vet if they Start acting lethargic....I don't think Zoey would have made it thru the night....she too is a little 4 lber...
Good luck