my 7 weeks old shih tzu dont like eating her food. right now i mix her kibble with puppy formula. she only sniff it and then walk away. but if i bring her to my friends house and eat with her brother (my friend have the same puppy) she eat like the hungriest dog. my friend feed her puppy rice+fish+kibble+warm water. i tried to give her at home and she seem love fishes. but i dont want to give her fish, so i continue give her kibble and formula, but she only drink the formula :( .

plus. she is not as playful as my friends puppy. my friends puppy play almost all day, but she sleeps almost all day

She may be sick. Take her & have her checked out. Also, she's too young to be sold, but that's a moot point. She may not have been taught to eat solid food. Try softening her food with warm water & mash it up til it's thin. If she eats that, then gradually decrease the amount of water you add.

Your puppy got sold or given to you at too young of an age, which means the person who you got her from doesn't know what they're doing. For a puppy this tiny, you can't mess around too much and if she's sleeping she could be sick.

She needs a vet quickly. She's just too tiny. It's good that she's eating the formula, but she shouldn't be sleeping so much, so please get her to a vet before something really bad happens.

sounds as tho she is sick i would take her vets right away

maybe she got bored of the same taste and you should change it if that doesn't work then she might be sick?!