The first week of house-training a Chihuahua puppy is a numbers game played against a very small bladder. She will need the toilet far more often than you expect, she will give almost no warning, and she may think cold grass is an unreasonable request. A plan built on frequent trips, one consistent spot and generous praise teaches her the idea within days, while punishment would only teach her to hide from you when she needs to go.
Setting up one toilet spot she can reach fast
One toilet spot close to the door suits a Chihuahua puppy best in week one. Choose a small patch of grass or gravel she can reach within seconds of being picked up, because a long carry across a big garden wastes the moment she is ready to go. Take her to the same spot every time so the scent builds and tells her what the place is for. If your home has stairs or a flat layout that makes outdoor trips slow, a sheltered balcony patch or a real-grass tray near the door can serve as the starter spot while she is tiny.
The first-week rhythm of trips and timing
Timing drives Chihuahua house-training more than any cue word. Take her out the second she wakes, straight after every meal, after any play session, after a drink, and at least hourly while she is awake, plus last thing before bed. Watch for the early signs between trips: circling, sniffing the floor intently, wandering away from the group or squatting slightly. Scoop her up mid-signal and carry her out calmly rather than calling her, because a tiny puppy who sets off walking toward the door will rarely arrive in time. When she performs outside, praise her on the spot and offer a small treat there, not back in the kitchen, so the reward belongs to the outdoor act.
Handling accidents without punishment
Accidents in a Chihuahua puppy's first week are scheduling information, not naughtiness. If you find a puddle, clean it with an enzymatic cleaner and shorten the gap between trips, because the plan failed her before she failed the plan. If you catch her mid-accident, lift her gently and carry her to the spot without a cross word, then praise her if she finishes there. Scolding, nose-rubbing or shouting will frighten a breed that is already easy to intimidate, and frightened puppies learn to toilet behind furniture where nobody can see. Keep her living space small for now, using a pen or one puppy-proofed room, so accidents happen on easy-clean flooring near you rather than on a bedroom carpet where you find them hours later.
Nights, naps and the crate question
Nights in week one will involve at least one outdoor trip for most Chihuahua puppies. Keep her sleeping area small and close, either a crate she has been introduced to happily or a pen beside your bed, and take her out quietly when she stirs and cries, with minimal light and no play, then straight back to bed. A puppy who is left to soil her sleeping space learns the wrong lesson and makes the nights longer, so the boring midnight trip is worth it. During the day, treat every nap as a timer: the moment those eyes open, she goes out before she is even fully awake.
When slow progress means a vet visit
Slow progress in a Chihuahua puppy deserves a vet check if she is straining, passing tiny amounts very often, crying when she toilets, or producing loose stools repeatedly, because a small puppy can become unwell quickly and bladder or tummy trouble will wreck any training rhythm. Also call the vet if she suddenly cannot manage intervals she handled two days earlier. Otherwise, expect steady rather than perfect results: dry spells lengthening, accidents clustering around excitement or bad weather, and real reliability still weeks away. Sharing the hourly trips, night duty and accident clean-up as Care Teams tasks in KinsLe means each break gets done on time, gets marked complete, and no single person carries the whole first-week schedule alone.