Before 4 months

Eyes, ears, teeth, weaning, and growth rates for puppies and kittens — as reference windows, not deadlines every animal must hit.

Newborn body temperature runs lower than an adult's, and a chilled newborn must not be fed until it is warm again. Reference ranges, safe rewarming, and when to call.

Why the milk you choose matters, how aspiration happens, and why this is the one topic where you need a veterinarian to show you in person.

Newborns cannot go on their own at first. What assistance involves, when they start managing alone, and what straining without output means.

What stool consistency can and can't tell you, which changes need a call, and why a nursing newborn is not judged by the same timeline as an adult.

When solids start, how to read a nutritional adequacy statement, and why large-breed puppies need a different label check than everyone else.

Why one injection never completes the series, what the core schedules actually say, and why no flea product has a single universal starting age.

Kittens start and finish earlier than puppies. What to expose them to, how to handle the vaccination conflict, and what fear looks like.

Which signs mean go now, which mean call now, and which mean call today — plus why daily weight is the earliest warning you get.

Xylitol, paracetamol in cats, dog flea products on cats — the mistakes that kill, plus the neutering-timing debate handled honestly.