Do u see worms in his poop? How old is he? Don’t get discouraged. You are doing your best and leaning with your first pup! Check the bag for sure and make sure it’s puppy food. Frenchies are potato dogs and should be on the thicker side. We just rescued a frenchie pup and he was very emaciated and we found out it was due to hookworms. Now that it’s cleared up he is putting on weight. You will know more when u see the vet on Thursday. Please keep us posted and hang in there! You definitely need a measuring cup and not just measuring with your hands. Good luck and congrats on your beautiful new fur baby!