If you're currently hovering over a litter of newborns wondering a los cuantos días abren los ojitos los perritos, you're probably feeling a mix of excitement and maybe a little bit of "new parent" anxiety. It's completely normal to want to see those tiny eyes staring back at you, but the truth is, Mother Nature has a very specific schedule for this, and she doesn't like to be rushed. Usually, you're looking at a window of about 10 to 14 days before those lids even start to flicker open, but every pup is an individual, and some take a bit longer than others.
It's honestly one of the most magical parts of raising puppies. One day they're just these little blind, deaf sausages wiggling around for milk, and the next, you catch a glimpse of a dark slit. But before you get too impatient, let's talk about why this happens on the timeline it does and what you should—and definitely shouldn't—do while you wait.
The typical timeline for opening their eyes
While the 10 to 14-day mark is the gold standard, don't freak out if your puppy is on day 12 and still has their eyes shut tight. Some breeds, and even just some specific puppies in a litter, might wait until day 21. It's a range, not a hard deadline. Usually, the eyes don't just pop open all at once like a doll's eyes; they start at the corner, often the inner corner near the nose, and slowly "unzip" over a day or two.
You might notice one eye opens a full day before the other. It makes them look a little lopsided and incredibly goofy, but it's totally fine. Development isn't always symmetrical. During this time, their nervous system is working overtime, and those eyes are finishing their final "baking" process behind the lids.
Why are they born with their eyes closed anyway?
It seems like a bit of a disadvantage, right? Being born unable to see where you're going or where the "milk bar" is located sounds tough. But dogs are what we call altricial species. This is just a fancy way of saying they are born in an underdeveloped state and need a lot of care.
The reason a los cuantos días abren los ojitos los perritos is such a common question is that we expect mammals to be ready to go at birth. But for dogs, their eyes are actually still developing after they leave the womb. If they were open at birth, the light and the air could actually damage the delicate tissues. The eyelids act like a protective barrier, keeping out dust and bright light while the nerves and the retina finish their growth. Plus, puppies are basically embryos on the outside for the first two weeks—they can't even regulate their own body temperature yet!
The golden rule: Never, ever force them open
This is the most important thing to remember. No matter how curious you are, or how much you want that perfect Instagram photo, never try to peel or pry a puppy's eyes open.
If you force them open before they're ready, you could cause permanent damage. You might scratch the cornea, introduce a nasty infection, or disrupt the tear ducts that haven't fully formed. If the eyes are still shut, it's because the body says they aren't ready to handle the world yet. If you hit day 20 and there's still no movement, or if you see swelling or pus, that's when you call the vet—but you still don't touch them yourself.
What do they see when they first open?
Don't expect your puppy to start tracking a ball across the room the second their eyes open. When those lids first part, their vision is incredibly blurry. They can mostly just distinguish between light and dark and see some very vague shapes. It's a bit like looking through a thick fog or a smeared window.
You'll also notice their eyes look a bit cloudy or have a distinct bluish or grayish tint. Don't panic—they don't have cataracts! This is just the "puppy blue" phase. The tapetum lucidum (the part that helps them see in the dark) and the iris aren't fully pigmented yet. That true eye color—whether it's brown, amber, or blue—won't really settle in until they're about eight to ten weeks old.
Breed differences play a role
Believe it or not, breed can actually influence the answer to a los cuantos días abren los ojitos los perritos. Some smaller breeds or toy breeds might be a bit quicker on the draw, while some larger, heavier-set breeds take their sweet time.
For example, many Cocker Spaniels are known to open their eyes a bit later than some other breeds. It's not a hard-and-fast rule, but it's something to keep in mind if you have a mixed litter or if you're comparing your pup to a friend's dog of a different breed. As long as the puppy is gaining weight, moving toward Mom, and seems healthy otherwise, a few extra days of shut-eye isn't a cause for concern.
Setting the right environment
Since their eyes are so sensitive when they first open, you want to make sure the environment is "eye-friendly." You don't want to have the puppies in a room with harsh, direct sunlight or bright overhead fluorescent lights.
Keep the whelping box in a dimly lit, quiet area. When they start to open their eyes, they might squint or shy away from light. Gradually introducing more light into the room over the following week helps their pupils learn how to react and constrict properly. It's all about a slow transition from the dark "cave" of the first two weeks into the bright world of being a functional dog.
Red flags to watch out for
While 99% of the time this process happens perfectly on its own, you do need to be a bit of a detective. You should be checking the puppies' faces at least a couple of times a day. Here is what should trigger a call to the vet:
- Bulging or swelling: If one eye looks like it's "puffing up" behind the lid, there could be an infection trapped underneath.
- Discharge or pus: Any yellow or green goo leaking from the corners of the closed eyes is a bad sign.
- Crusting: If the eyelids look "glued" shut with dried gunk, they might need a very gentle wipe with a warm, damp cotton ball (but again, ask your vet first).
- No opening by Day 20: If you've passed the three-week mark and there's no sign of life in the eye department, a professional needs to take a look.
The world starts to get loud, too
Usually, around the same time you're figuring out a los cuantos días abren los ojitos los perritos, you'll notice their ears starting to open up as well. Newborn puppies are also born with sealed ear canals.
Around the 14-day mark, you'll see the eyes crack open, and shortly after, they'll start reacting to noises. This is when the "potato" phase ends and the "explorer" phase begins. They'll start to recognize their mother's voice and the sounds of their littermates. It's a sensory explosion for them, so keep things calm and quiet during this transition so they don't get overwhelmed.
Enjoy the milestone
Watching a puppy see the world for the first time is one of the biggest rewards of breeding or fostering. It marks the end of the "neonatal" period and the beginning of their socialization. Once those eyes are open, they'll start to interact with each other more, wiggling around and trying to play, even if they still look like they've had one too many at the pup-pub.
Just be patient. Those little eyes will open when they're ready. In the meantime, keep the mama dog happy, keep the puppies warm, and get your camera ready—because once they start looking at you, everything changes!