Poop is normal, it doesn't matter.
It's best not to drink milk. He can't absorb it. Four meals a day four months ago, a puppy fed 10- 15 capsules was almost enough. The puppy's stomach is very small, Chihuahua is still a puppy, and it is easy to go bad.
If you suspect that you have a cold, you can take his temperature. Thermometers can be used by people. It can be inserted into his ass or sandwiched in his thigh, which is equivalent to the position of a person's groin. Hold him down. It's more accurate to stick it in your ass. Puppy's temperature is 38.5-39.
Don't bathe him now. Wash him after immunization, once every ten days to two weeks. Washing too much will hurt his hair. Now that he is dirty, you can wipe it with a hot towel.
Once the dog goes to bed, you can't let it go down. My dog crawls on the bed at night and can't kick.